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JP2017183866

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DESCRIPTION JP2017183866
PROBLEM TO BE SOLVED: To provide a windshield for a gun microphone which can properly
shut off wind noise such as wind noise even when using a gun microphone. A second space is
defined to define a first space between itself and a first cover. And a third covering that defines a
second space between the second covering and the air flowing into the second space along the
longitudinal direction of the second covering. Forming a second longitudinal flow path for
moving, and a first longitudinal flow path for moving the air flowing into the first space along the
longitudinal direction of the first cover. [Selected figure] Figure 1
Windshield for gun microphone
[0001]
The present invention relates to a windshield used for a gun microphone having directivity.
[0002]
A so-called gun microphone (shotgun microphone) is often used to pick up sound from a
distance.
The gun microphone is a microphone that has sharp directivity and can pick up the sound to
which the gun microphone is directed by canceling surrounding sounds.
03-05-2019
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[0003]
In general, a gun microphone has an elongated long cylindrical interference tube. By interfering
and canceling the sound emitted from the sound source located on the side of the gun
microphone inside the interference tube, it is possible to mainly collect the sound of the point to
which the gun microphone is directed.
[0004]
As mentioned above, the gun microphone has an elongated interference tube. Therefore, when
wind noise such as wind noise is collected using a gun microphone, it is necessary to cover the
whole gun microphone including the interference tube with a windshield.
[0005]
As one of the conventional windshields, there is a windshield in which fibers are implanted on
the inner diameter side of a substantially cylindrical sponge. This windshield was intended to be
hard to come off from the microphone having a long shape by the flocked fibers (see, for
example, Patent Document 1).
[0006]
There are also windshields that have a cage-like frame. While forming a space between the cagelike frame and the microphone having a long shape, the windshield is supported by the frame
(see, for example, Patent Document 2).
[0007]
Furthermore, it is a windshield made of an elastic body of open cells, and a slide guide member is
provided on the inner peripheral surface of the elastic body. By providing the slide guide
member, it is intended to enhance the removability with the microphone having a long shape
(see, for example, Patent Document 3).
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2
[0008]
JP, 2006-60479, A JP, 2012-175379, A JP, 2008-187312, A
[0009]
As noted above, various windshields have been devised.
However, even if the wind noise can be reduced at the beginning of use, the windshield made of
an elastic body of open cells such as a sponge gradually undergoes aging due to moisture such as
rain, and it is difficult to maintain the characteristics there were.
[0010]
The present invention has been made in view of the above-described point, and the object of the
present invention is a windshield for a gun microphone that can be attached to a long-shaped
gun microphone, and even when it is mounted on a gun microphone An object of the present
invention is to provide a windshield for a gun microphone which can properly shut off wind
noise such as turning noise.
[0011]
The embodiment of the windshield for a gun microphone according to the present invention is a
first jacket covering the gun microphone, the first jacket having an elongated shape and
containing an acoustically transparent material, and the first jacket covering the first jacket. A
second covering, spaced apart from the first covering, having an elongated shape and including
an acoustically transparent material, and a first covering between the first covering and the
second covering; A second covering defining a space, and a third covering covering the second
covering, wherein the third covering is spaced apart from the second covering and has an
elongated shape and And a third covering including an acoustic transmitting material and
defining a second space between the second covering and the acoustic transmitting material,
wherein the acoustic transmitting material entangles the raw materials including fibers with each
other. Containing the fiber material obtained by A second longitudinal flow path is formed in the
second space in which the air flowing into the second space moves along the longitudinal
direction of the second cover, and in the first space, the first longitudinal flow path is formed.
The first longitudinal flow path is formed in which the air flowing into the space of (1) moves
along the longitudinal direction of the first cover.
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[0012]
Since the sound transmitting material contains a fiber material obtained by interlacing the raw
materials comprising fibers, it is possible to prevent aging over a long period of time.
[0013]
Further, in the second space, a second longitudinal flow path is formed, which moves the air
flowing into the second space along the longitudinal direction of the second cover.
For this reason, since the air which flowed in into the 2nd space moves in the longitudinal
direction, it can leak from the 2nd space and can be hard to enter into the 1st space.
[0014]
Furthermore, in the first space, a first longitudinal flow path is formed which moves the air
flowing into the first space along the longitudinal direction of the first cover.
For this reason, the air which has flowed into the first space also moves in the longitudinal
direction, so that it is difficult for the air to leak from the first space and enter the gun
microphone, and the wind noise can be cut off properly.
[0015]
Even if used for a long time, the wind noise can be cut off properly.
[0016]
It is a schematic diagram showing the outline of windshield 100 for gun microphones by this
embodiment.
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FIG. 1A is a cross-sectional view of a gun microphone windshield 100, FIG. 1B is a cross-sectional
view showing the flow of air moving along the longitudinal direction of the gun microphone
windshield 100, and FIG. 1C is a perimeter of the gun microphone windshield 100. It is sectional
drawing which shows the flow of the air which moves along a direction.
It is a perspective view which shows the whole windshield 100 for gun microphones. FIG. 5 is a
perspective view showing a first sound transmitting body 110, a second sound transmitting body
120, a third sound transmitting body 130, an elastic foam 140, a basket 150, and a gun
microphone 300 stored in a gun microphone windshield 100. It is sectional drawing which cut ¦
disconnects and shows the structure of windshield 100 for gun microphones in the
circumferential direction. It is sectional drawing which cut ¦ disconnects and shows the structure
of windshield 100 for gun microphones in a longitudinal direction. A cross-sectional view (A)
showing the flow of air flowing in the longitudinal direction and a cross-sectional view (B)
showing a flow of air flowing in the circumferential direction in the first space SP10 and the
second space SP20. FIG. 6 is a perspective view showing a first sound transmitting body 110, a
second sound transmitting body 120, a third sound transmitting body 130, a basket 150, and a
gun microphone 300 housed in a gun microphone windshield 200. It is sectional drawing which
cut ¦ disconnects and shows the structure of the windshield 200 for gun microphones in the
circumferential direction. It is sectional drawing which cut ¦ disconnects and shows the structure
of windshield 200 for gun microphones in a longitudinal direction. The component LP10 moving
along the longitudinal direction in the first sound transmitting body 110 and the component
AP10 moving along the circumferential direction, the component LP20 moving along the
longitudinal direction in the second sound transmitting body 120 and the circumferential
direction It is the schematic which shows the component AP20 which moves along. It is a side
view showing basket 150 and grasping vibration isolation structure 400. As shown in FIG. FIG. 6
is a perspective view showing a basket 150 and a grip and vibration control structure 400. FIG. 7
is an enlarged side view showing the structure of a grip portion 410. FIG. 7 is a perspective view
showing the entire grip and vibration control structure 400. FIG. 10 is a front view showing a
state in which the first sound transmitting body 110 and the second sound transmitting body
120 are attached to the elastic holding body 434. It is a perspective view which shows the state
which attached the 1st sound transmission body 110 to the elastic holding body 434. FIG. FIG.
16 is a perspective view showing an end of the basket 150.
[0017]
Embodiments will be described below based on the drawings. FIG. 1 is a schematic view of a first
embodiment of the present invention. FIG. 1A is a cross-sectional view of a gun microphone
windshield 100, FIG. 1B is a cross-sectional view showing the flow of air moving along the
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longitudinal direction of the gun microphone windshield 100, and FIG. 1C is a perimeter of the
gun microphone windshield 100. It is sectional drawing which shows the flow of the air which
moves along a direction.
[0018]
<First Embodiment> As shown in FIGS. 1A, 1B, and 1C, according to a first embodiment of the
present invention, a first cover for covering a gun microphone 30 (for example, a gun
microphone 300 described later). 11, a first covering 11 (e.g., a first acoustic transmitting body
110 to be described later, etc.) having an elongated shape and containing an acoustic
transmitting material, and a second covering covering the first covering 11 The cover 12 is
disposed at a position distant from the first cover 11 and has an elongated shape and includes an
acoustically transparent material, and the first cover 11 is interposed between the first cover 11
and the second cover 11. A second covering 12 (for example, a second sound transmitting body
120 to be described later) which defines a space SP1 (for example, a first space SP10 described
later), and a second covering 12 that covers the second covering 12 Three coverings 13 and are
separated from the second covering 12. A third, having an elongated shape and including an
acoustically transparent material, and defining a second space SP2 (for example, a second space
SP20 described later) between the second cover 12 and the third And the covering 13 (for
example, the third sound transmitting body 130 described later), and the sound transmitting
material includes a fiber material obtained by interlacing the raw materials including the fibers, A
second part of the air that has flowed into the second space SP2 along the longitudinal direction
of the second cover 12 in the second space SP2. A longitudinal channel LP2 (for example, a
component LP20 moving along a longitudinal direction to be described later) is formed, and the
air flowing into the first space SP1 in the first space SP1 is used as the first covering body 11
longitudinal directions The first longitudinal passage LP1 (e.g., such as component LP10 that
moves along the longitudinal direction to be described later) which moves along the the gun
microphone for windshield 10 formed is provided.
[0019]
<Wind 10 for Gun Microphone and Gun Microphone 30> The wind shield 10 for gun microphone
is a windshield for covering the gun microphone 30.
The gun microphone 30 is a microphone which has directivity and picks up a sound emitted
from a desired sound source. The gun microphone 30 has an interference tube and the like, and
generally has a long shape. The gun microphone windshield 10 includes a first cover 11, a
second cover 12 and a third cover 13.
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[0020]
<Sound transmitting material> The first covering 11, the second covering 12 and the third
covering 13 all contain a sound transmitting material. The sound transmitting material comprises
a fibrous material. The fiber material is obtained by interlacing raw materials comprising fibers
with one another. The sound transmitting material blocks some of the contacted air and allows
the rest to pass.
[0021]
The sound transmitting materials used for the first cover 11, the second cover 12 and the third
cover 13 may be the same or different materials. Further, even if the material is the same, the
material may be different, such as the aspect of density or confusing. The material and material
of the sound transmitting material may be determined so that the wind noise can be cut off
properly and the sound emitted from the desired sound source can be collected.
[0022]
By using an acoustically transparent material for the first cover 11, the second cover 12, and the
third cover 13, it is possible to prevent aging over a long period of time.
[0023]
<Outline of First Cover 11, Second Cover 12, and Third Cover 13> Further, the first cover 11, the
second cover 12, and the third cover 13 have a long length. It has a scale shape.
The shapes of the first cover 11, the second cover 12 and the third cover 13 can be determined
according to the shape of the gun microphone 30 having a long shape.
[0024]
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It is desirable that the first cover 11, the second cover 12 and the third cover 13 have a
substantially cylindrical shape. Furthermore, the first cover 11, the second cover 12 and the third
cover 13 have various cylindrical shapes such as a rectangular cylindrical shape and an elliptical
cylindrical shape, as well as a substantially cylindrical shape. can do.
[0025]
The lengths along the longitudinal direction of the first cover 11, the second cover 12 and the
third cover 13 are preferably all the same. In this case, the length along the longitudinal direction
of the first space SP1 described later and the length along the longitudinal direction of the
second space SP2 are the same. The flow of air in the first space SP1 and the flow of air in the
second space SP2 can be separated, and the flows of air can be separately controlled.
[0026]
In addition, the lengths along the longitudinal direction of the first cover 11, the second cover 12
and the third cover 13 may be different. For example, when the length along the longitudinal
direction of the second cover 12 is shorter than the length along the longitudinal direction of the
first cover 11 and the third cover 13, the first cover The boundary between the first space SP1
and the second space SP2 disappears in a region near the end of the 11 and the third covering
13 and is sandwiched by the first covering 11 and the third covering 13 A space in which the
second cover 12 does not exist is formed. In this case, the air of the first space SP1 and the
second space SP2 can move directly through the space where the second cover 12 does not exist.
Thus, when the lengths along the longitudinal direction of the first cover 11, the second cover 12
and the third cover 13 are different, the air can be easily moved.
[0027]
<First Cover 11> The first cover 11 covers the gun microphone 30. The gun microphone 30
generally has an elongated shape, and an opening for interference is formed along the
longitudinal direction. The first cover 11 may cover the gun microphone 30 so as to cover at
least a part of the interference opening. It is preferable to cover the gun microphone 30 so that
the first cover 11 covers the entire interference opening.
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[0028]
It is preferable that the length in the longitudinal direction of the first cover 11 be longer than
the length in the longitudinal direction of the gun microphone 30. More preferably, the first
cover 11 covers the gun microphone 30 so as to accommodate the entire gun microphone 30
except for a cable or the like connected to the gun microphone 30. Furthermore, it is desirable
that the first cover 11 be disposed concentrically (coaxially) with the gun microphone 30 so as to
cover the entire gun microphone 30.
[0029]
<Second Cover 12> The second cover 12 covers the first cover 11. The second cover 12
preferably encloses the entire first cover 11 and covers the first cover 11. The second cover 12
may be configured to cover a part of the first cover 11 as long as wind noise can be blocked.
[0030]
Furthermore, it is more preferable that the length in the longitudinal direction of the second
cover 12 is the same as the length in the longitudinal direction of the first cover 11. It is
desirable that the second cover 12 be disposed concentrically (coaxially) along the longitudinal
direction of the first cover 11 and cover the entire first cover 11 so as to be accommodated.
[0031]
The second cover 12 is disposed at a position separated from the first cover 11. A gap between
the first cover 11 and the second cover 12 forms a first space SP1. The distance DT1 between
the first cover 11 and the second cover 12 may not be constant. It is only necessary to block
wind noise by forming the first space SP1 between the first cover 11 and the second cover 12 to
make air less likely to leak inside the first cover 11. By arranging the second cover 12
concentrically (coaxially) with the first cover 11, the interval DT1 can be made constant. By
making the interval DT1 between the first cover 11 and the second cover 12 constant, air which
has entered the first space SP1 can be evenly dispersed.
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[0032]
Third Cover 13 The third cover 13 covers the second cover 12. The third cover 13 preferably
encloses the entire second cover 12 to cover the second cover 12. The third cover 13 may be
configured to cover a part of the second cover 12 as long as wind noise can be blocked.
[0033]
Furthermore, it is more preferable that the length in the longitudinal direction of the third cover
13 be the same as the length in the longitudinal direction of the second cover 12. The third cover
13 is preferably arranged concentrically (coaxially) along the longitudinal direction of the second
cover 12 so as to cover the entire second cover 12 so as to be accommodated.
[0034]
The third cover 13 is disposed at a position separated from the second cover 12. A gap between
the second cover 12 and the third cover 13 forms a second space SP2. The distance DT2
between the second cover 12 and the third cover 13 may not be constant. It is only necessary to
block wind noise by forming a second space SP2 between the second cover 12 and the third
cover 13 to make air less likely to leak inside the second cover 12. By arranging the third
covering 13 concentrically (coaxially) with the second covering 12, the interval DT2 can be made
constant. By making the distance DT2 between the second cover 12 and the third cover 13
constant, air that has entered the second space SP2 can be evenly dispersed.
[0035]
<Second Longitudinal Channel LP2> As shown in FIG. 1B, the second longitudinal channel LP2 is
formed in the second space SP2. The second longitudinal channel LP2 is a path along which the
air flowing into the second space SP2 moves along the longitudinal direction of the second cover
12.
[0036]
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10
The second space SP2 is a space formed between the second cover 12 and the third cover 13.
The second cover 12 and the third cover 13 have an elongated shape, and the second space SP2
also has an elongated shape. The second space SP2 functions as an area for facilitating the
movement of air in the longitudinal direction of the second space SP2. The air that has flowed
into the second space SP2 is guided by the contact with the second cover 12 and the contact with
the third cover 13 and moves in the second space SP2 along the longitudinal direction. The path
of this air movement is the second longitudinal flow path LP2.
[0037]
The second longitudinal channel LP2 does not have to be always along the longitudinal direction
of the second space SP2, but may include a path along the longitudinal direction. For example, if
movement along the longitudinal direction is included even if a path moving toward the second
cover 12 or the third cover 13 or a path meandering within the second space SP2 is included
Good.
[0038]
Also, the length of the second longitudinal channel LP2 may be short. It is not necessary for the
second longitudinal channel LP2 to reach the end of the second space SP2. It is only necessary to
include a portion where the air moves along the longitudinal direction of the second space SP2.
[0039]
<First Longitudinal Channel LP1> As shown in FIG. 1B, the first longitudinal channel LP1 is
formed in the first space SP1. The first longitudinal channel LP1 is a path along which the air
flowing into the first space SP1 moves in the longitudinal direction of the first cover 11.
[0040]
The first space SP1 is a space formed between the first cover 11 and the second cover 12. The
first cover 11 and the second cover 12 have an elongated shape, and the first space SP1 also has
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an elongated shape. The first space SP1 functions as an area for facilitating the movement of air
in the longitudinal direction of the first space SP1. The air that has flowed into the first space SP1
is guided by the contact between the first cover 11 and the second cover 12, and travels in the
first space SP1 along the longitudinal direction. The path of this movement of air is the first
longitudinal channel LP1.
[0041]
The first longitudinal channel LP1 does not have to be always along the longitudinal direction of
the first space SP1, and may include a path along the longitudinal direction. For example, if
movement along the longitudinal direction is included even if a path moving toward the first
cover 11 or the second cover 12 or a path meandering within the first space SP1 is included
Good.
[0042]
Also, the length of the first longitudinal channel LP1 may be short. It is not necessary for the first
longitudinal channel LP1 to reach the end of the first space SP1. It suffices to include a portion in
which the air moves along the longitudinal direction of the first space SP1.
[0043]
<Flow of Air> When the windshield 100 for a gun microphone is used outdoors or the like, the
windshield 100 for a gun microphone is exposed to air by the flow of air such as wind.
Specifically, air comes in contact with the third cover 13. The third covering 13 comprises an
acoustically transparent material, which blocks the part of the contacted air and allows the
remainder to pass through. The air having passed through the third cover 13 enters the second
space SP2. The air that has entered the second space SP2 is guided by the contact with the
second cover 12 and the contact with the third cover 13 and moves in the second space SP2
along the longitudinal direction. The movement of the air forms a second longitudinal channel
LP2.
[0044]
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Thus, a part of the air in contact with the third cover 13 is blocked and the rest passes. For this
reason, only a part of the air in contact with the third cover 13 passes, and the third cover 13
reduces the amount of air entering the second space SP2 or reduces the momentum. Can.
Furthermore, the air that has entered the second space SP2 is gradually decelerated by the
contact with the second cover 12 and the contact with the third cover 13, and the force of the air
can be suppressed.
[0045]
The second covering 12 comprises an acoustically transparent material, which blocks some of
the contacted air and allows the rest to pass. There is also air passing through the second cover
12 depending on the amount and momentum of the air that has entered the second space SP2.
[0046]
The air having passed through the second cover 12 enters the first space SP1. The air that has
entered the first space SP1 is guided by the contact with the first cover 11 and the contact with
the second cover 12, and moves in the first space SP1 along the longitudinal direction. The
movement of the air forms a first longitudinal channel LP1.
[0047]
In this way, part of the air in contact with the second cover 12 is blocked and the rest passes. For
this reason, only a part of the air in contact with the second cover 12 passes, and the amount of
air entering the first space SP1 is reduced or suppressed by the second cover 12. Can.
Furthermore, the air that has entered the first space SP1 is gradually decelerated by the contact
with the first cover 11 and the contact with the second cover 12, and the force of the air can be
suppressed.
[0048]
The gun microphone 30 is covered by the first cover 11, and even if there is air that has entered
the first space SP1, the first cover 11 blocks the passage of air, and the wind noise is properly
corrected. Can block it.
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[0049]
Even when the gun microphone windshield 100 is used outdoors or the like, the second space
SP2 and the first space SP1 can gradually reduce the amount of air or suppress the momentum,
and the passage of air to the gun microphone 30 Can block the wind noise properly.
[0050]
<Second Embodiment> <Elastic Foam> In the second embodiment of the present invention, in the
first embodiment of the present invention, an elastic foam having open cells (for example, an
elastic foam 140 described later, etc.) Are provided in at least a part of the first space SP1 or the
second space SP2.
[0051]
It is preferable to provide an elastic foam in at least one of the first space SP1 or the second
space SP2.
The elastic foam has open cells.
The elastic foam can control the direction of the air flow by the open cells, or can gradually
decelerate by obstructing the air flow by collision with the open cells.
Thus, the elastic foam can suppress the direction and speed of air.
[0052]
Thus, the direction and speed of the air which has entered the first space SP1 or the second
space SP2 can be further suppressed by the elastic foam.
[0053]
<Third Embodiment> <Second Circulation Channel AP2> As shown in FIGS. 1A, 1B, and 1C, the
third embodiment of the present invention is the above-mentioned first embodiment of the
present invention. In the second space SP2, a second circumference which moves the air, which
03-05-2019
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has passed through the third covering and flowed into the second space SP2, along at least a part
of the periphery of the second covering 12 It is configured to form a circular flow path AP2 (for
example, a component AP20 moving along a circumferential direction described later).
[0054]
As shown in FIG. 1C, in the second space SP2, a second circulation flow path AP2 is formed.
The second circulation flow path AP2 is a path along which air flowing into the second space SP2
moves in a direction in which the second cover 12 circulates.
[0055]
The second space SP2 is a space formed between the second cover 12 and the third cover 13.
The third cover 13 is disposed at a position separated from the second cover 12, and the second
space SP <b> 2 has a shape that goes around the second cover 12. The second space SP2
functions as an area for facilitating the movement of air in the direction around the second cover
12. The air flowing into the second space SP2 is guided by the contact with the second cover 12
and the contact with the third cover 13 and moves along the direction around the second cover
12. The path of this air movement is the second circulation flow path AP2.
[0056]
The second circulation flow path AP2 does not have to be always along the direction in which the
second cover 12 is circulated, and may include a path along the circulation direction. For
example, even if a path moving toward the second cover 12 or the third cover 13 or a path
meandering in the second space SP2 is included, the movement along the direction of rotation is
included. Just do it.
[0057]
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Further, the length of the second circulation flow path AP2 may be short. It is not necessary for
the second circulation flow path AP2 to go around the entire second cover 12. It suffices to
include a portion moving along the direction in which the air circulates around the second cover
12.
[0058]
<Second Longitudinal Channel LP2 and Second Circulating Channel AP2> As described above, the
second longitudinal channel LP2 and the second circumferential channel AP2 are formed in the
second space SP2. The second longitudinal channel LP2 and the second circulation channel AP2
mean components of the moving direction of the air flowing through the second space SP2. The
second longitudinal channel LP2 means a component of the air flowing through the second space
SP2 that moves along the longitudinal direction of the second cover 12. The second circulation
flow path AP2 means a component of the air flowing through the second space SP2 that moves
along the direction in which the second cover 12 circulates. The air flowing through the second
space SP2 has a component moving along the longitudinal direction of the second cover 12 and a
component moving along the direction around the second cover 12.
[0059]
<Fourth Embodiment> <First Circulating Flow Path AP1> As shown in FIGS. 1A, 1B, and 1C, the
fourth embodiment of the present invention is the first embodiment of the present invention,
wherein In the first space SP1, the air flowing through the second cover 12 into the first space
SP1 is moved along at least a part of the periphery of the first cover 11. It is comprised so that
circulation flow path AP1 (For example, component AP10 etc. which move along the
circumferential direction mentioned later) may be formed.
[0060]
As shown in FIG. 1C, in the first space SP1, a first circulation flow path AP1 is formed.
The first circulation flow path AP1 is a path along which air flowing into the first space SP1
moves in a direction in which the first cover 11 circulates.
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[0061]
The first space SP1 is a space formed between the first cover 11 and the second cover 12. The
second cover 12 is disposed at a position spaced apart from the first cover 11, and the first space
SP <b> 1 has a shape that goes around the first cover 11. The first space SP1 functions as an area
for facilitating the movement of air in the direction around the first cover 11. The air flowing into
the first space SP1 is guided by the contact between the first cover 11 and the second cover 12
and moves along the direction in which the first cover 11 circulates. The path of this air
movement is the first circulation flow path AP1.
[0062]
The first circulation flow path AP1 does not have to be always along the direction in which the
first cover 11 is circulated, and may include a path along the circulation direction. For example,
even if a path moving toward the first cover 11 or the second cover 12 or a path meandering in
the first space SP1 is included, the movement along the direction of rotation is included. Just do
it.
[0063]
Further, the length of the first circulation flow path AP1 may be short. It is not necessary for the
first circulation channel AP1 to go around the entire first cover 11. It suffices to include a portion
in which the air moves along the direction in which the first cover 11 circulates.
[0064]
<First Longitudinal Channel LP1 and First Circulating Channel AP1> As described above, the first
longitudinal channel LP1 and the first circumferential channel AwP1 are formed in the first space
SP1. The first longitudinal channel LP1 and the first circulation channel AP1 mean components
of the moving direction of the air flowing in the first space SP1. The first longitudinal channel
LP1 means a component of the air flowing through the first space SP1 moving along the
longitudinal direction of the first cover 11. The first circulation flow path AP1 means a
component of the air flowing in the first space SP1 that moves along the direction in which the
first cover 11 circulates. The air flowing through the first space SP1 has a component moving
03-05-2019
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along the longitudinal direction of the first cover 11 and a component moving along the direction
around the first cover 11.
[0065]
<Fifth Embodiment> <Length Along the Longitudinal Direction of the First Cover 11 and Length
Along the Longitudinal Direction of the Second Cover 12> The fifth embodiment of the present
invention relates to the present invention In the first embodiment, the length along the
longitudinal direction of the first cover 11 and the second cover 12 is the distance between the
first space SP1 or the distance between the second space SP2. Configured to be longer than.
[0066]
The length along the longitudinal direction of the first cover 11 and the second cover 12 is
longer than the spacing of the first space SP1 or the spacing of the second space SP2.
[0067]
The spacing of the first space SP1 is the spacing DT1 between the first covering 11 and the
second covering 12.
When the first cover 11 and the second cover 12 have a cylindrical shape and are arranged
concentrically (coaxially), the distance between the first spaces SP1 is constant. It becomes.
[0068]
If the interval of the first space SP1 is not constant, a characteristic interval may be used.
For example, it may be an average interval, a maximum interval, or a minimum interval.
[0069]
The spacing of the second space SP2 is the spacing DT2 between the second covering 12 and the
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third covering 13. When the second cover 12 and the third cover 13 have a cylindrical shape and
are arranged concentrically (coaxially), the distance between the second spaces SP2 is constant.
It becomes.
[0070]
If the interval of the second space SP2 is not constant, a characteristic interval may be used. For
example, it may be an average interval, a maximum interval, or a minimum interval.
[0071]
The first cover 11 and the second cover 12 have an elongated shape. The length of the first cover
11 can be sufficiently longer than the spacing of the first space SP1. That is, even when the space
of the first space SP1 is shortened, the length in the longitudinal direction of the first space SP1
can be secured, and the first space SP1 serves as an area for moving the entrapped air in the
longitudinal direction. It can be made to function. The length of the second cover 12 can be made
sufficiently longer than the spacing of the second space SP2. That is, even when the space of the
second space SP2 is shortened, the length in the longitudinal direction of the second space SP2
can be secured, and the second space SP2 serves as a region for moving the entrapped air in the
longitudinal direction. It can be made to function.
[0072]
The interval of the second space SP2 is set to the first space SP1 according to the length of the
second cover 12 in the longitudinal direction and the length of the third cover 13 in the
longitudinal direction and the presence or absence of the elastic foam. The length may be such
that air does not easily flow in.
[0073]
The space of the first space SP1 is such that air flows into the gun microphone 30 according to
the length of the first cover 11 in the longitudinal direction and the length of the second cover
12 in the longitudinal direction and the presence or absence of the elastic foam. The length
should be difficult.
[0074]
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19
<Sixth Embodiment> A fourth cover (for example, a basket 150 described later, etc.) which has an
elongated shape and covers and protects the third cover, and a sound transmission port for
transmitting sound. And a fourth cover having the
[0075]
The fourth cover has an elongated shape and covers and protects the third cover.
It is preferred to cover the entire third covering.
The fourth cover has a sound transmission port through which sound can be transmitted.
The fourth cover can protect the third cover from deformation or breakage. A sound
transmission port is formed in the fourth cover, and the sound can be made to reach the gun
microphone 300 without attenuating or degrading the sound emitted from the sound source.
[0076]
<Seventh Embodiment> The seventh embodiment further includes an elastic holding portion (for
example, an elastic holding member 434 described later) which elastically holds the first cover
11 and the second cover 12.
[0077]
The elastic holding portion elastically holds the first cover 11 and the second cover 12.
By holding elastically, even when an impact is applied from the outside, the impact can be
absorbed by the elastic holding portion, and when the first cover 11 and the second cover 12
vibrate, the impact is transmitted to the gun microphone 300. It can be prevented from being
picked up as noise. In the present embodiment, the impact includes not only the impact caused
by the physical collision but also the sound generated by the wind and propagating the solid as
vibration (hereinafter, referred to as solid sound). Solid sound is picked up as wind noise.
03-05-2019
20
[0078]
Eighth Embodiment The eighth embodiment is provided in the elastic holding portion, and holds
the first cover 11 and the second cover 12 to hold the shape, and the first cover 11 and the It
further includes a fixed holding portion (for example, a bracket 440 or the like to be described
later) that maintains a distance (for example, a first space SP1 to be described later) with the two
covers 12.
[0079]
The fixed holding portion is provided on the elastic holding portion, and holds the first cover 11
and the second cover 12 to hold the shape.
The shaped holding portion maintains a distance between the first cover 11 and the second cover
12. For example, even when the first cover 11 and the second cover 12 are formed of easily
deformable members, it is possible to maintain a fixed shape, and the first cover 11 and the
second cover 12 By keeping the interval, it is possible to form a longitudinal flow passage, a
circulation flow passage, etc. for moving the inflowing air.
[0080]
<Ninth Embodiment> The first cover 11 has a gun microphone holding portion (for example, the
inside of the first sound transmitting member 110 described later, etc.) for housing and holding
the gun microphone.
[0081]
The first cover 11 has a gun microphone holder.
The gun microphone holder holds and holds the gun microphone in the first cover 11. The gun
microphone can be accommodated without using a separate member for attachment such as an
adapter for attaching the gun microphone to the first cover 11, and the gun microphone can be
easily and easily attached and removed.
03-05-2019
21
[0082]
<Tenth embodiment> A grip portion (for example, a grip portion 410 described later) which can
be supported by the user and is detachably connected to the elastic holding portion through the
fourth cover. , Further equipped.
[0083]
The grip is a member that can be supported by the user.
For example, the gripping portion is a member that can be gripped and supported by the user's
hand. The grip portion is detachably connected to the elastic holding portion. The grip portion is
coupled to the elastic holding portion with the fourth cover interposed therebetween. In other
words, in the state where the grip portion is connected to the elastic holding portion, the fourth
cover is sandwiched by the grip portion and the elastic holding portion. The holding part can be
attached as needed, and handling at the time of transportation etc. can be simplified.
[0084]
<Eleventh embodiment> A gripping portion elastic holder (for example, a vibration absorbing
member 416 described later, etc.) which is provided between the fourth covering and the
gripping portion and elastically holds the fourth covering. And.
[0085]
The grip portion elastic holder is an elastically deformable member, and elastically holds the
fourth cover.
The grip portion elastic holder is provided between the fourth cover and the grip portion. Even
when an impact or solid sound is applied to the grip portion, solid sound or impact can be
absorbed by the elastic holding body of the grip portion, so that transmission of solid sound or
impact to the fourth cover can be prevented, and the impact on the gun microphone 300 It can
be prevented from being picked up as noise.
[0086]
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22
<<<< First Embodiment >>>> First, a windshield 100 for a gun microphone according to a first
embodiment will be described. The difference from the gun microphone windshield 200
according to the second embodiment described later is the presence or absence of the elastic
foam 140 in the second space SP20.
[0087]
FIG. 2 is a perspective view showing the whole of the windshield 100 for a gun microphone. FIG.
3 is a perspective view showing a first sound transmitting body 110, a second sound transmitting
body 120, a third sound transmitting body 130, an elastic foam 140, a basket 150, and a gun
microphone 300 housed in the gun / microphone windshield 100. FIG. FIG. 4 is a cross-sectional
view showing the configuration of the gun / microphone windshield 100 in the circumferential
direction. FIG. 5 is a cross-sectional view showing the configuration of the gun / microphone
windshield 100 in the longitudinal direction. FIG. 6 is a cross-sectional view (A) showing the flow
of air flowing in the longitudinal direction and a cross-sectional view (B) showing the flow of air
flowing in the circumferential direction in the first space SP10 and the second space SP20. It is.
[0088]
<<< Gun for Microphone and Microphone 100 >>> A windshield for gun and microphone 100
according to the present embodiment is a windshield used for so-called gun and microphone
300. The gun microphone 300 is a microphone that has sharp directivity, can cancel surrounding
sounds, and can pick up the sound to which the gun microphone 300 is directed.
[0089]
<< Gun Microphone (Shot Gun Microphone) 300 >> As shown in FIG. 3, the gun microphone 300
has a substantially cylindrical and elongated long outer shape. The gun microphone 300 mainly
includes a microphone body 310 and an interference tube 320.
[0090]
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23
The interference tube 320 has an elongated, substantially cylindrical shape. The interference
tube 320 has a first end 330 and a second end 340 along the longitudinal direction. An opening
332 is formed at the first end 330. By directing the opening 332 to the sound source to be
collected, the sound emitted from the sound source can be transmitted to the inside of the
interference tube through the opening 332.
[0091]
The second end 340 of the interference tube 320 is connected to a microphone body 310 having
a diaphragm. The diaphragm vibrates in response to the sound propagating inside the
interference tube 320. The microphone body 310 converts the vibration of the diaphragm into
an electrical signal and outputs it as an audio signal.
[0092]
Furthermore, a plurality of slits 350 are formed on the side surface of the interference tube 320.
Sound emitted from a sound source located to the side of the gun microphone 300 (interference
tube 320) passes through the plurality of slits 350 and enters the inside of the interference tube
320. Sounds passing through the plurality of slits 350 interfere and cancel each other inside the
interference tube. The sound emitted from the sound source on the side of the gun microphone
300 is not a target of sound collection. By canceling the sounds that have passed through the
plurality of slits 350 inside the interference tube, the sound can be prevented from reaching the
microphone main body 310. As described above, the gun microphone 300 can collect the sound
by enhancing the directivity by providing the interference tube 320.
[0093]
When the gun microphone is used outdoors or the like, the flow of air such as wind can easily
touch not only the opening 332 of the gun microphone 300 but also the interference tube 320.
As described above, the plurality of slits 350 are formed on the side surface of the interference
tube 320, and flowing air such as wind can easily enter the inside of the interference tube 320
through the plurality of slits 350. When air flows into the inside of the interference tube 320, the
flow of the air makes it easy to vibrate the diaphragm of the microphone body 310, which causes
so-called wind noise. Therefore, the gun / microphone windshield 100 needs to cover the entire
03-05-2019
24
gun / microphone 300 including the interference tube 320.
[0094]
<< Main Configuration of Windshield 100 for Gun Microphones >> As shown in FIG. 3, the
windshield 100 for gun microphones mainly includes the first sound transmitting body 110, the
second sound transmitting body 120, and the third sound transmitting body. 130, an elastic
foam 140 and a basket 150. As described later, each of the first sound transmitting body 110,
the second sound transmitting body 120, the third sound transmitting body 130, the elastic foam
140, and the basket 150 has an elongated shape and is substantially concentric. Are arranged in
a shape (substantially coaxial).
[0095]
<< First sound transmitting body 110, second sound transmitting body 120, and third sound
transmitting body 130 >> First sound transmitting body 110, second sound transmitting body
120, and third sound transmitting body 130 Each is formed by curving the substantially thin
plate-like sound transmitting member into a cylindrical shape. The sound transmitting member
prevents the passage of a part of the contacted air. The remaining air that can not be blocked
passes through the sound transmitting member. The sound transmitting member will be
described in detail later.
[0096]
<Shape and Size> As shown in FIGS. 3, 4 and 5, each of the first sound transmitting body 110, the
second sound transmitting body 120, and the third sound transmitting body 130 is an elongated,
substantially cylindrical member. It has a letter shape. The first sound transmitting body 110, the
second sound transmitting body 120, and the third sound transmitting body 130 are different in
thickness from each other, and the first sound transmitting body 110 is the narrowest, and then
the second sound transmitting body 120 is thick, and the third sound transmitting body 130 is
thickest.
[0097]
In other words, the first sound transmitting body 110, the second sound transmitting body 120,
03-05-2019
25
and the third sound transmitting body 130 have different radii (diameters), and the radius
(diameter) of the first sound transmitting body 110 is The smallest radius (diameter) of the third
sound transmitting body 130 is the largest, and the radius (diameter) of the second sound
transmitting body 120 is larger than the radius (diameter) of the first sound transmitting body
110, and This is smaller than the radius (diameter) of the three sound transmitting members
130.
[0098]
Further, the lengths (the heights of so-called cylinders) along the longitudinal direction of the
first sound transmitting body 110, the second sound transmitting body 120, and the third sound
transmitting body 130 are all substantially the same.
The longitudinal ends of the first sound transmitting body 110, the second sound transmitting
body 120, and the third sound transmitting body 130 can be aligned.
[0099]
The sound source side end 112 of the first sound transmitting body 110, the sound source side
end 122 of the second sound transmitting body 120, and the sound source side end 132 of the
third sound transmitting body 130, respectively, Is also blocked by the sound transmitting
member. Air flowing in through the tip portion 152 of the basket 150 can be prevented from
entering the inside of the first sound transmitting body 110, the second sound transmitting body
120, and the third sound transmitting body 130.
[0100]
Further, an end 114 of the first sound transmitting body 110 opposite to the sound source side,
an end 124 of the second sound transmitting body 120 opposite to the sound source side, and a
third sound transmitting body 130. The end 134 opposite to the sound source side is open. It is
possible to easily damp the air as a whole while balancing air mutually between the first space
SP10 and the second space SP20 described later, and it is possible to weaken the rapid air flow.
03-05-2019
26
[0101]
<Arrangement> As shown in FIGS. 3, 4 and 5, the first sound transmitting body 110, the second
sound transmitting body 120, and the third sound transmitting body 130 have such shapes and
sizes. Thus, the first sound transmitting body 110 is covered with the second sound transmitting
body 120, and the second sound transmitting body 120 is covered with the third sound
transmitting body 130. , And the second sound transmitting body 120 and the third sound
transmitting body 130 can be arranged substantially concentrically (coaxially) so as to
sequentially cover.
[0102]
The first sound transmitting body 110 and the second sound transmitting body 120 are radially
spaced apart from each other, and the second sound transmitting body 120 and the third sound
transmitting body 130 are radially separated from each other Will be placed.
[0103]
As described later, the gun microphone 300 is disposed on the inner side of the first sound
transmitting body 110 along the longitudinal direction.
The radius of the first sound transmitting member 110 is set larger than the radius of the gun
microphone 300 to be used.
[0104]
The first sound transmitting member 110 also functions as a holding member for detachably
accommodating and holding the gun microphone 300.
The first sound transmitting body 110 has a cylindrical shape, and the length in the longitudinal
direction of the first sound transmitting body 110 is longer than the length in the longitudinal
direction of the gun microphone 300. Therefore, the gun microphone 300 can be smoothly
attached to and detached from the first sound transmitting member 110, and the entire gun
microphone 300 can be accommodated in the first sound transmitting member 110 while
securing a gap (air layer) at the tip of the gun microphone. it can.
03-05-2019
27
[0105]
<Acoustic Transmission Member> The acoustic transmission member is made of a fiber material
obtained by interlacing raw materials comprising fibers, and the air permeability of the fiber
material is less than 0.5 s / 100 ml. Since this is a fiber material obtained by interlacing raw
materials comprising an air permeability of 0.5 s / 100 ml of the fiber material used as an
acoustic transmission member, it has innumerable irregular voids. This is because the density of
the fibers is so high that the wind causing wind noise is shut off.
[0106]
That is, the sound transmitting member made of a fiber material functions as a shield or a
moving direction conversion device (flap) against "wind" which is the movement of air molecular
mass, and movement of pressure change (medium itself vibrates It does not move alone, and it is
almost completely transparent to "sound".
[0107]
When the fiber material itself is self-supporting (rigid), it is not necessary to use other members
in combination, but the sound transmitting member has, for example, a structure in which the
fiber material is sandwiched between two reticulated members. It may be
[0108]
Here, the sound transmitting member will be described in detail.
[0109]
As described above, the sound transmitting member transmits a predetermined frequency range
(20 to 20 kHz), and the fiber material constituting it has an air permeability of less than 0.5 s /
100 ml.
By having the said property, sound transmission property improves notably.
Air permeability means the time taken for a certain amount of air to pass under a certain
03-05-2019
28
pressure under a certain area, where 100 ml of air takes for a sheet-like acoustically transparent
material It's time.
The air permeability is measured by the Gurley method defined in JIS P8117.
[0110]
In addition, the air permeability of less than 0.5 s / 100 ml means that the measurable range in
the device used for the measurement of the present application is 0.5 s / 100 ml or more, and
the air permeability of the sound transmitting member is measured by this measurement. It is
because it was less than the possible range.
[0111]
The sound transmitting member is obtained by interlacing raw materials comprising fibers.
For example, by making paper by a wet paper-making method, a fiber material in which fibers
are mutually entangled can be obtained. The raw material used for manufacturing the fiber
material is metal fiber or fluorine fiber in the present embodiment. The fiber material used as the
sound transmitting member has a thickness of 3 mm or less, preferably 10 μm to 2000 μm,
and more preferably 20 μm to 1500 μm. With such a thickness, an effective wind noise
reduction effect can be obtained with a certain degree of rigidity and a minimal simple
framework.
[0112]
However, the raw material of the fiber material is not limited to metal fibers and fluorine fibers,
and the thickness is not limited to the above-mentioned values.
[0113]
Next, the material of the metal fiber as a raw material of a fiber material is demonstrated.
[0114]
03-05-2019
29
When metal fiber is used as the sound transmitting member and manufactured by wet sheet
forming, the metal fiber material is obtained by making a slurry comprising one or two or more
metal fibers by the wet sheet forming method. When it manufactures by compression molding
using a metal fiber, it is obtained by pressurizing the aggregate ¦ assembly of a metal fiber under
a heating, and it is a metal fiber material with which a metal fiber is mutually entangled.
The shape of the metal fiber material is not particularly limited, but a metal fiber sheet is
preferable.
[0115]
Hereinafter, the material, structure and manufacturing method of the metal fiber will be
described in detail.
In addition, as said metal fiber material and its manufacturing method, the content of description
of Unexamined-Japanese-Patent No. 2000-80591, the patent 2649768, and the patent 2562761
shall also be integrated in this specification.
[0116]
1 type or 2 or more types of metal fibers that are materials of metal fibers are 1 type selected
from fibers made of metal materials such as stainless steel, aluminum, brass, copper, titanium,
nickel, gold, platinum, lead and the like Or a combination of two or more.
[0117]
The metal fiber material has a structure in which metal fibers are entangled with each other.
Moreover, the metal fiber which comprises the said metal fiber has a fiber diameter of 1
micrometer-50 micrometers, Preferably 2 micrometers-30 micrometers, More preferably, 8
micrometers-20 micrometers. Such a metal fiber is suitable for interlacing metal fibers, and by
intermingling such metal fibers, a metal fiber sheet having a small amount of standing and
having sound permeability. It becomes possible to
03-05-2019
30
[0118]
The method of producing a metal fiber material by a wet sheet-forming method forms a sheet
containing moisture on a net when the slurry comprising one or more types of metal fibers is
formed into a sheet by a wet sheet-forming method. Fiber entanglement processing step of
intermingling the metal fibers with each other.
[0119]
Here, as the fiber entanglement treatment step, for example, it is preferable to adopt a fiber
entanglement treatment step in which a high-pressure jet water stream is jetted on the metal
fiber sheet surface after paper making. Specifically, a direction orthogonal to the sheet flow
direction By arranging a plurality of nozzles at the same time and simultaneously injecting a high
pressure jet stream from the plurality of nozzles, it is possible to entangle metal fibers across the
entire sheet.
That is, for example, by injecting a high-pressure jet water stream in the Z-axis direction of the
sheet onto a sheet composed of metal fibers randomly intersected in the planar direction by wet
papermaking, the metal fibers of the portion where the high-pressure jet water stream is ejected
Is oriented in the Z-axis direction. Metal fibers oriented in the Z-axis direction are entangled
between irregularly oriented metal fibers in a planar direction, and each fiber is entangled threedimensionally with each other, that is, it can obtain physical strength by entanglement It is.
[0120]
As the paper making method, for example, various methods such as fourdrinier paper making,
circular wire making, inclined wire paper making, etc. can be adopted as needed. In addition,
when the slurry containing the metal fiber of a long fiber is manufactured, since the dispersibility
in water of a metal fiber may worsen, highs, such as polyvinyl pyrrolidone, a polyvinyl alcohol,
carboxymethylcellulose (CMC), etc. which have a thickening effect. A small amount of molecular
aqueous solution may be added.
[0121]
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31
The method of manufacturing the metal fiber material by compression molding is as follows.
First, the fibers are put together and pre-compressed to form a web, or after impregnating the
binder between the fibers to give a bond between the fibers, it is preliminary. Etc. Thereafter, the
metal fiber assembly is pressurized under heating to form a metal fiber sheet. The binder is not
particularly limited, but, for example, in addition to organic binders such as acrylic adhesives,
epoxy adhesives and urethane adhesives, inorganic adhesives such as colloidal silica, water glass
and sodium silicate It can be used. Note that, instead of impregnating the binder, the surface of
the fiber may be coated with a heat adhesive resin in advance, and the metal fiber assembly may
be laminated and then heated and adhered. The amount of the binder to be impregnated is
preferably 5 to 130 g and more preferably 20 to 70 g with respect to 1000 g / m 2 of the sheet
surface weight.
[0122]
The assembly of metal fibers is pressurized under heat to form a sheet. The heating conditions
are set in consideration of the drying temperature and the curing temperature of the binder and
the heat adhesive resin to be used, but the heating temperature is usually about 50 to 1000 ° C.
The pressure is adjusted in consideration of the elasticity of the fiber, the thickness of the sound
transmitting member, and the light transmittance of the sound transmitting member. In addition,
when impregnating a binder by a spray method, it is preferable to shape ¦ mold a metal fiber
layer to predetermined ¦ prescribed thickness by press process etc. before carrying out a spray
process.
[0123]
Moreover, the manufacturing method of a metal fiber material is comprised including the
sintering process which sinters the obtained metal fiber material in the vacuum or non-oxidizing
atmosphere in the temperature below melting ¦ fusing point of metal fiber after the wet sheetforming process mentioned above (In the case of compression molding, heating and pressing
replace this sintering step). That is, if the sintering step is performed after the above-described
wet sheet-forming step, the fiber entanglement treatment is performed, and there is no need to
add an organic binder or the like to the metal fiber material. It becomes possible to produce a
metal fiber material having a shiny surface unique to metal without causing any obstacle in the
process. In addition, since the metal fibers are entangled, it is possible to further improve the
strength of the metal fiber material after sintering. Furthermore, by sintering the metal fiber
material, it exhibits high acoustic transparency and becomes a material excellent in
waterproofness. If it does not sinter, the remaining thickening polymer absorbs water, which may
03-05-2019
32
result in poor waterproofness.
[0124]
Next, the material of the fluorine fiber as a raw material of a fiber material is demonstrated.
[0125]
When a fluorine fiber is used as the fiber, the fluorine fiber material is a material (paper) in
which short fibers in the irregular direction are made of short fibers and the fibers of the fibers
are bonded by heat fusion. .
[0126]
Hereafter, the material and manufacturing method of fluorine fiber are explained in full detail.
In addition, as said fluorine fiber material and its manufacturing method, the content of
description of Unexamined-Japanese-Patent No. 63-165598 shall also be integrated in this
specification.
[0127]
The fluorine fiber is produced from a thermoplastic fluorine resin, and as its main components,
polytetrafluoroethylene (PTFE), tetrafluoroethylene (TFE), perfluoroether (PFE),
tetrafluoroethylene and hexafluoropropylene Copolymer (FEP), copolymer of tetrafluoroethylene
and ethylene or propylene (ETFE), vinylidene fluoride resin (PVDF), polychlorotrifluoroethylene
resin (PCTFE), vinyl fluoride resin (PVF) The resin is not limited to these as long as it is made of a
fluorine resin, and may be used in combination with these or other resins.
Here, the fluorine fiber is preferably a single fiber having a fiber length of 1 to 20 mm and a fiber
diameter of 2 to 30 μm in order to obtain a paper-like product by a wet papermaking method. It
is suitable.
[0128]
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33
The fluorine fiber material is obtained by mixing and drying a fluorine fiber and a substance
having a self-adhesion function according to a wet sheet-forming method, and thermally bonding
the fluorine fiber mixed paper material obtained by drying at a temperature equal to or higher
After heat-fusing, the material having a self-adhesive function is dissolved away with a solvent,
and re-dried if necessary.
[0129]
Here, as a substance having a self-adhesive function, natural pulp consisting of plant fibers such
as wood, cotton, hemp, straw and the like usually used for papermaking, polyvinyl alcohol (PVA),
polyester, aromatic polyamide, acrylic, polyolefin It is possible to use synthetic pulp and
synthetic fibers made of thermoplastic synthetic polymers of the present invention, and paperpaper strength agents made of natural polymers and synthetic polymers, etc. It is not limited to
these as long as it can be dispersed in water.
[0130]
The sound transmitting member of the present invention includes a fiber material obtained by
making a raw material including fibers by a wet papermaking method, and it is sufficient if the
air permeability of the fiber material is less than 0.5 s / 100 ml. Not limited to these.
[0131]
As described above, the sound transmitting member has a density of fibers having an infinite
number of irregular gaps, and can block the wind that causes wind noise.
The sound transmitting member made of a fiber material functions as a shield against "wind"
which is the movement of air molecular mass, or functions as a movement redirecting device
(flap), and also moves air pressure change (the medium itself is It exhibits almost complete
transparency to "sounds", which only vibrate and do not move.
[0132]
The first sound transmitting body 110, the second sound transmitting body 120, and the third
sound transmitting body 130 are configured by such sound transmitting members, and basically
shut off the wind that causes the wind noise. can do.
03-05-2019
34
However, since the gun microphone 300 is often used outdoors, it is easily affected by wind, and
since it has a long shape, the area exposed to the wind must be large.
Therefore, by providing the first sound transmitting body 110, the second sound transmitting
body 120, and the third sound transmitting body 130, the first space SP10 and the second space
SP20 described later are formed, and the air It is necessary to shut off the flow.
[0133]
<< First Space SP10 and Second Space SP20 >> As described above, the first sound transmitting
body 110 and the second sound transmitting body 120 are disposed substantially concentrically
and separated from each other There is. Therefore, the first space SP10 can be defined in a
region sandwiched by the first sound transmitting body 110 and the second sound transmitting
body 120 (see FIGS. 4 and 5). The first space SP10 is a gap having a generally cylindrical shape
as a whole. The length along the longitudinal direction of the first space SP10 is determined by
the length along the longitudinal direction of the first sound transmitting body 110 and the
second sound transmitting body 120. The thickness of the side surface of the first space SP10 is
the distance DT10 between the first sound transmitting member 110 and the second sound
transmitting member 120, and the radius of the first sound transmitting member 110 and the
second sound transmitting member It is determined by the difference with the radius of 120.
[0134]
Similarly, a second space SP20 can be defined in a region sandwiched between the second sound
transmitting body 120 and the third sound transmitting body 130 (see FIGS. 4 and 5). The
second space SP20 is a gap having a generally cylindrical shape as a whole. The length along the
longitudinal direction of the second space SP20 is determined by the length along the
longitudinal direction of the second sound transmitting body 120 and the third sound
transmitting body 130. The thickness of the side surface of the second space SP20 is a distance
DT20 between the second sound transmitting member 120 and the third sound transmitting
member 130, and the radius of the second sound transmitting member 120 and the third sound
transmitting member It is determined by the difference with the radius of 130.
03-05-2019
35
[0135]
<< Elastic Foam 140 >> The elastic foam 140 is generally made by foaming a synthetic resin such
as polyurethane, and is formed of a sponge-like elastic foam having open cells. The elastic foam
140 is provided over the entire second space SP20. Therefore, the elastic foam 140 has
substantially the same shape and size as the second space SP20, and the second space SP20 is
occupied (filled) by the elastic foam 140.
[0136]
Alternatively, the elastic foam 140 may be filled in the entire second space SP20 or may be
provided only in part. For example, the elastic foam 140 may be cylindrical and attached to the
inside of the third sound transmitting body 130 so that a gap is formed with the outside of the
second sound transmitting body 120. Alternatively, the elastic foam 140 may be provided only at
the central portion or both end portions of the second space SP20. The elastic foam 140 may be
appropriately provided so that the flow of air generated in the second space SP20 is attenuated.
[0137]
<< Basket 150 >> As shown in FIGS. 2 and 3, the basket 150 includes the gun microphone 300
and the first sound transmitting member 110, the second sound transmitting member 120, the
third sound transmitting member 130, and an elastic foam. It is a covering for protecting the
whole of 140. The basket 150 has functions of passing sound and protecting the gun
microphone 300 and the like housed inside.
[0138]
<Shape / Size> The basket 150 has a tip portion 152 and a cylindrical portion 154. The tip
portion 152 has a substantially hemispherical shape. The cylindrical portion 154 has an
elongated cylindrical shape. The tip portion 152 and the cylindrical portion 154 are formed in a
mesh shape with a fine gap, and can allow external sound to pass through.
[0139]
03-05-2019
36
The radius of the cylindrical portion 154 is slightly longer than the radius of the third sound
transmitting body 130. In addition, the length in the longitudinal direction of the cylindrical
portion 154 is slightly longer than the lengths in the longitudinal direction of the first sound
transmitting body 110, the second sound transmitting body 120, the third sound transmitting
body 130 and the elastic foam 140. .
[0140]
The cylindrical portion 154 has a first end 156a and a second end 156b along the longitudinal
direction. The tip 152 can be removably attached to the first end 156 a of the cylindrical portion
154. The second end 156 b has a substantially circular opening. The first sound transmitting
body 110, the second sound transmitting body 120, the third sound transmitting body 130, and
the elastic foam 140 are inserted into the cylindrical portion 154 of the basket 150 from the
opening of the second end portion 156b. It can be stored. In other words, the whole of the first
sound transmitting body 110, the second sound transmitting body 120, the third sound
transmitting body 130 and the elastic foam 140 can be covered by the basket 150.
[0141]
The first sound transmitting body 110, the second sound transmitting body 120, the third sound
transmitting body 130, and the elastic foam 140 are fixed to each other at predetermined
positions by a fixing member (not shown) inside the basket 150. Ru. Thus, the first sound
transmitting body 110, the second sound transmitting body 120, the third sound transmitting
body 130, the elastic foam 140, and the basket 150 are integrated. The integration may be fixed
or removable.
[0142]
The opening 332 of the interference tube 320 of the gun microphone 300 is positioned inside
the tip 152. An acoustic transmitting body (not shown) is also provided inside the tip portion
152. Not only the sound transmitting body but also the elastic foam 140 may be provided inside
the tip portion 152.
03-05-2019
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[0143]
The third sound transmitting body 130 may be provided over the entire inner peripheral surface
of the basket 150, and the third sound transmitting body 130 and the basket 150 may be
integrally formed. The attachment of the third sound transmitting body 130 can be facilitated,
and the shape of the third sound transmitting body 130 can be kept constant.
[0144]
<Material> The basket 150 only needs to pass sound and protect the first sound transmitting
body 110 and the like housed inside. For example, the basket 150 can be formed of a resin such
as reinforced plastic, or a metal such as plastic aluminum.
[0145]
The radius of the cylindrical portion 154 is larger than the radius of the third sound transmitting
body 130. In addition, the length in the longitudinal direction of the cylindrical portion 154 is
slightly longer than the lengths in the longitudinal direction of the first sound transmitting body
110, the second sound transmitting body 120, the third sound transmitting body 130 and the
elastic foam 140. .
[0146]
By integrating the first sound transmitting body 110, the second sound transmitting body 120,
the third sound transmitting body 130, the elastic foam 140 and the basket 150, the gun
microphone windshield 100 can be configured.
[0147]
The gun microphone 300 can be covered with the gun microphone windshield 100 by storing
the gun microphone 300 along the longitudinal direction inside the first sound transmitting body
110.
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As shown in FIG. 3, a cable 360 for outputting an electrical signal is connected to the gun
microphone 300. The gun microphone windshield 100 has a size that can cover the entire gun
microphone 300 including the connection end where the cable 360 is connected to the gun
microphone 300.
[0148]
<< Flow of Air in First Space SP10, Second Space SP20 (Change in Pressure) >> In the following,
with reference to FIG. 6, the flow of air that has entered the first space SP10, and the second The
flow of air that has entered the space SP20 will be described.
[0149]
<Flow of Air in Second Space SP20 (Change in Pressure)> FIG. 6A is a cross-sectional view
showing the flow of air guided along the longitudinal direction in the second space SP20.
FIG. 6B is a cross-sectional view showing the flow of air guided along the circumferential
direction (direction around the second sound transmitting member 120) in the second space
SP20. For the sake of clarity, the basket 150 is omitted in FIGS. 6A and 6B.
[0150]
The second space SP20 is a region sandwiched between the second sound transmitting body 120
and the third sound transmitting body 130. In addition, the elastic foam 140 is filled in the
second space SP20.
[0151]
The air that has passed through the basket 150 first contacts the sound transmitting member of
the third sound transmitting body 130. A part of the contacted air is blocked by the sound
transmitting member. For example, the blocked air travels along the sound transmitting member
and is reflected by the sound transmitting member. The remaining air not blocked by the sound
transmitting member passes through the sound transmitting member. Since blocking by the
03-05-2019
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sound transmitting member, the amount of air passing through the sound transmitting member
and entering the second space SP20 (elastic foam 140) can be reduced.
[0152]
The air that has entered the second space SP 20 enters the elastic foam 140. The elastic foam
140 has open cells, and the air entering the elastic foam 140 moves along the open cells. The
elastic foam 140 can control the direction of air flow. In addition, the air flow can be impeded by
the collision with the open cells, and the air can be gradually decelerated. Thus, the elastic foam
140 can suppress the speed of air.
[0153]
Furthermore, the second space SP20 (elastic foam 140) is sandwiched between the second sound
transmitting body 120 and the third sound transmitting body 130, and the air that has entered
the elastic foam 140 is the second space. Each time it contacts the sound transmitting body 120
and the third sound transmitting body 130, it is blocked and travels. Thus, the air that has
entered the elastic foam 140 moves in the second space SP 20 while being guided by the second
sound transmitting member 120 and the third sound transmitting member 130, and the second
sound transmitting member 120 And the third sound transmitting member 130, and the collision
with the elastic foam 140, etc. to gradually decelerate (see FIG. 10).
[0154]
The air moving in the second space SP20 is a component LP20 (see FIGS. 6A and 10) moving
along the longitudinal direction of the second sound transmitting body 120 and the third sound
transmitting body 130; It has component AP20 (refer FIG. 6B and FIG. 10) which moves along
the circumferential direction of the sound transmission body 120 and the 3rd sound
transmission body 130. As shown in FIG.
[0155]
<Flow of Air in Longitudinal Direction in Second Space SP20> The second sound transmitting
member 120 and the third sound transmitting member 130 have an elongated shape in
accordance with the gun microphone 300 so as to cover the gun microphone 300 in the
03-05-2019
40
longitudinal direction. Have.
For this reason, the second space SP20 sandwiched between the second sound transmitting body
120 and the third sound transmitting body 130 also has a long, substantially cylindrical shape,
and the second space SP20 is a gun microphone 300. In accordance with the longitudinal length
of the space, the space extends in the longitudinal direction.
[0156]
The length in the longitudinal direction of the second space SP20 can be determined in
accordance with the outer shape of the gun microphone 300 to be used. For example, the length
in the longitudinal direction of the second space SP20 can be approximately the same as or
slightly longer than the length in the longitudinal direction of the gun microphone 300, and can
be 10 times or more the diameter of the gun microphone 300.
[0157]
The second space SP20 is a region for enabling air to flow in the longitudinal direction, and the
air that has entered the second space SP20 can move in the longitudinal direction. That is, the air
that has entered the second space SP20 can be gradually decelerated by the elastic foam 140
while being guided in the longitudinal direction by the second sound transmitting body 120 and
the third sound transmitting body 130. By securing a space in which air can move sufficiently in
the longitudinal direction by the second space SP20, it is possible to increase the opportunity to
gradually decelerate while moving the air, and from the second space SP20 to the first space
SP10 Air can be difficult to enter.
[0158]
As described above, the second space SP20 is a space in which a region in which the air can flow
in the longitudinal direction is secured, and functions as a buffer region of the flow of air for
making the air difficult to enter the first space SP10.
[0159]
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<Flow of circumferential air in second space SP20> Further, the second sound transmitting
member 120 and the third sound transmitting member 130 have a substantially cylindrical
shape, and the gun microphone 300 is moved around the gun microphone 300. Cover 300.
For this reason, the second space SP20 sandwiched between the second sound transmitting body
120 and the third sound transmitting body 130 also has a substantially cylindrical shape which
goes around the gun microphone 300, and the second space SP20 is It is also a space that covers
the gun microphone 300 in the circumferential direction.
[0160]
The diametrical thickness of the second space SP20 can be determined in accordance with the
diameter of the gun microphone 300. For example, the thickness in the diametrical direction of
the second space SP20 can be made equal to or smaller than the diameter of the gun microphone
300 or smaller than the radius. In addition, the thickness in the diametrical direction of the
second space SP20 may be larger than the diameter of the gun microphone 300.
[0161]
In any case, the second space SP20 only needs to function as a buffer area for the flow of air, and
the second space SP20 only needs to secure a space in which air can move sufficiently. A space
in which air can move sufficiently may be determined by the balance between the length in the
longitudinal direction of the second space SP20 and the thickness in the diametrical direction of
the second space SP20. For example, even if the thickness in the diametrical direction of the
second space SP20 is shortened, it is only necessary to secure a space in which air can
sufficiently move by increasing the length in the longitudinal direction of the second space SP20.
[0162]
The second space SP20 is an area for enabling air to flow along the circumferential direction, and
the air that has entered the second space SP20 can move along the circumferential direction.
That is, the elastic foam 140 can gradually decelerate the air having entered the second space SP
20 while guiding the air in the circumferential direction by the second sound transmitting body
03-05-2019
42
120 and the third sound transmitting body 130. By securing a space where air can move
sufficiently in the circumferential direction by the second space SP20, the opportunity to
gradually decelerate while moving the air can be increased, and from the second space SP20 to
the first space SP10 Air can be difficult to enter.
[0163]
As described above, the second space SP20 is a space in which a region in which the air can flow
in the longitudinal direction and the circumferential direction is secured, and as a buffer region
of the flow of air for making the air difficult to enter the first space SP10. Function.
[0164]
<Flow of Air in Second Space SP20> As described above, the air that has entered the second
space SP20 travels along the circumferential direction with the component LP20 (see FIGS. 6A
and 10) moving along the longitudinal direction. Component AP 20 (see FIGS. 6B and 10).
The component LP20 in the longitudinal direction and the component AP20 in the
circumferential direction are determined by the angle, the velocity distribution, and the like with
respect to the third sound transmitting member 130 when entering the second space SP20.
[0165]
The air of the longitudinal component LP 20 moves along the longitudinal direction while being
blocked by the second sound transmitting body 120 and the third sound transmitting body 130,
and is gradually decelerated by the elastic foam 140. The air of the component AP20 in the
circumferential direction also moves along the circumferential direction while being blocked by
the second sound transmitting member 120 and the third sound transmitting member 130, and
is gradually decelerated by the elastic foam 140. Thus, the second space SP20 functions as a
buffer area for gradually decelerating the air that has entered the second space SP20.
[0166]
The air that has entered the second space SP20 is not only decelerated in the second space SP20,
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43
but, depending on the flow velocity, angle, flow rate, etc., after flowing in the circumferential
direction, the opposite second space SP20 There is also a possibility of coming out of the basket
150 (see arrow OP20 in FIG. 6). The air flowing in the second space SP <b> 20 may be prevented
from entering the first space SP <b> 10 by being blocked by the second sound transmitting
member 120.
[0167]
<Flow of Air in First Space SP10 (Change in Pressure)> FIG. 6A is a cross-sectional view showing
the flow of air guided along the longitudinal direction in the first space SP10. FIG. 6B is a crosssectional view showing the flow of air guided along the circumferential direction (the direction
around the first sound transmitting member 110) in the first space SP10. For the sake of clarity,
the basket 150 is omitted in FIGS. 6A and 6B.
[0168]
The first space SP10 is an area sandwiched between the first sound transmitting body 110 and
the second sound transmitting body 120. Unlike the second space SP20, the first space SP10 is
not filled with the elastic foam 140. The elastic foam 140 may be appropriately filled in the first
space SP <b> 10 according to the environment in which the gun microphone 300 is used.
[0169]
As described above, the second space SP20 (elastic foam 140) functions as a buffer area for
gradually decelerating the air that has entered the second space SP20. Accordingly, air is less
likely to pass through the second sound transmitting body 120. However, depending on the
environment in which the gun microphone 300 is used, it is also assumed that air passes through
the second sound transmitting body 120. When air passes through the second sound
transmitting member 120, it also enters the first space SP10.
[0170]
The first space SP10 is sandwiched between the first sound transmitting body 110 and the
03-05-2019
44
second sound transmitting body 120, and the air that has entered the first space SP10 is the first
sound transmitting body 110 and the second sound transmitting body 110. Whenever it contacts
the sound transmitting body 120, it is blocked. Thus, the air that has entered the first space SP10
moves in the first space SP10 while being attenuated each time it contacts the first sound
transmitting body 110 and the second sound transmitting body 120 ( See Figure 10).
[0171]
The air moving in the first space SP10 is, similarly to the second space SP20, a component LP10
moving in the longitudinal direction of the first sound transmitting body 110 and the second
sound transmitting body 120 (FIG. 6A and FIG. 10) and a component AP10 (see FIGS. 6B and 10)
moving along the circumferential direction of the first sound transmitting body 110 and the
second sound transmitting body 120.
[0172]
<Flow of Air in Longitudinal Direction in First Space SP10> The first sound transmitting member
110 and the second sound transmitting member 120 have a long shape in accordance with the
gun microphone 300 so as to cover the gun microphone 300 in the longitudinal direction. Have.
For this reason, the first space SP10 sandwiched between the first sound transmitting body 110
and the second sound transmitting body 120 also has a long substantially cylindrical shape, and
the first space SP10 is a gun microphone 300. In accordance with the longitudinal length of the
space, the space extends in the longitudinal direction.
[0173]
The length in the longitudinal direction of the first space SP10 has substantially the same length
as that of the second space SP20. Therefore, for example, the length in the longitudinal direction
(axial direction) of the first space SP10 can be approximately the same as or slightly longer than
the length in the longitudinal direction of the gun microphone 300, and 10 times or more the
diameter of the gun microphone 300 The length of
[0174]
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45
The first space SP10 is also a region for enabling air to flow in the longitudinal direction, and air
that has entered the first space SP10 can move in the longitudinal direction. That is, the air that
has entered the first space SP10 can be gradually decelerated by contact while being guided in
the longitudinal direction by the first sound transmitting body 110 and the second sound
transmitting body 120. By securing a space in which air can move sufficiently in the longitudinal
direction by the first space SP10, it is possible to increase the opportunity to gradually decelerate
the air while moving it, and from the first space SP10 toward the gun microphone 300 Air can
not leak easily.
[0175]
As described above, the first space SP10 is also a space in which the area in which the air can
flow in the longitudinal direction is secured, and functions as a buffer area of the flow of air to
make it difficult for the air to enter the gun microphone 300.
[0176]
<Flow of circumferential air in the first space SP10> Further, the first sound transmitting body
110 and the second sound transmitting body 120 have a substantially cylindrical shape, and the
gun microphone 300 is moved around the gun microphone 300. Cover 300.
For this reason, the first space SP10 sandwiched between the first sound transmitting body 110
and the second sound transmitting body 120 also has a substantially cylindrical shape which
goes around the gun microphone 300, and the first space SP10 is It is also a space that covers
the gun microphone 300 in the circumferential direction.
[0177]
The diametrical thickness of the first space SP10 can be determined in accordance with the
diameter of the gun microphone 300. For example, the thickness in the diametrical direction of
the first space SP10 can be made equal to or smaller than the diameter of the gun microphone
300 or smaller than the radius. Further, the thickness in the diametrical direction of the first
space SP10 may be larger than the diameter of the gun microphone 300.
03-05-2019
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[0178]
In any case, the first space SP10 only needs to function as a buffer area for the flow of air, and
the first space SP10 only needs to secure a space in which the air can move sufficiently. A space
in which air can move sufficiently may be determined by the balance between the length in the
longitudinal direction of the first space SP10 and the thickness in the diametrical direction of the
first space SP10. For example, even if the thickness in the diametrical direction of the first space
SP10 is shortened, it is only necessary to secure a space in which the air can sufficiently move by
increasing the length in the longitudinal direction of the first space SP10.
[0179]
Furthermore, the size of the first space SP10 may be determined according to the size of the
second space SP20. For example, when the size of the second space SP20 is made sufficiently
larger than the size of the first space SP10, most of the air flow entering the second space SP20
is suppressed by the second space SP20. It is possible not to enter the first space SP10. In
addition, when the size of the second space SP20 is smaller than the size of the first space SP10,
a part of the flow of air that has entered the second space SP20 is suppressed by the second
space SP20. It is possible not to enter the space SP10 of 1. The size of the first space SP10 and
the size of the second space SP20 can be determined according to the environment in which the
gun microphone 300 is used, the structure of the interference tube 320, and the like.
[0180]
The first space SP10 is an area for allowing air to flow along the circumferential direction, and
air that has entered the first space SP10 can move along the circumferential direction. That is,
the air which has entered the first space SP10 can be gradually decelerated by contact while
being guided in the circumferential direction by the first sound transmitting body 110 and the
second sound transmitting body 120. By securing a space where air can move sufficiently in the
circumferential direction by the first space SP10, the opportunity to gradually decelerate while
moving the air can be increased, and from the first space SP10 toward the gun microphone 300
Air can not leak easily.
[0181]
As described above, the first space SP10 is a space in which the area in which the air can flow
03-05-2019
47
also in the circumferential direction is secured, and functions as a buffer area of the air flow for
making the air difficult to enter the gun microphone 300.
[0182]
<Flow of Air in First Space SP10> As described above, the air that has entered the first space
SP10 is moved along the circumferential direction with the component LP10 (see FIGS. 6A and
10) moving along the longitudinal direction. Component AP10 (see FIGS. 6B and 10).
The component LP10 in the longitudinal direction and the component AP10 in the
circumferential direction are determined by the angle, the velocity distribution, and the like with
respect to the second sound transmitting member 120 when entering the first space SP10.
[0183]
The air of the longitudinal component LP 10 moves along the longitudinal direction while being
blocked by the first acoustic transmitting body 110 and the second acoustic transmitting body
120, and is gradually decelerated by the elastic foam 140. The air of the component AP10 in the
circumferential direction also moves along the circumferential direction while being blocked by
the first sound transmitting body 110 and the second sound transmitting body 120, and is
gradually decelerated by the elastic foam 140. Thus, the first space SP10 functions as a buffer
area for gradually decelerating the air that has entered the first space SP10.
[0184]
The air that has entered the first space SP10 is not only decelerated in the first space SP10, but,
depending on the flow velocity, angle, and flow rate, after flowing in the circumferential
direction, the opposite first space SP10 There is also a case where the second space SP20 is
exited (see arrow OP10 in FIG. 6). It is sufficient that air flowing in the first space SP <b> 10 can
not easily reach the gun microphone 300 by being blocked by the first sound transmitting
member 110.
[0185]
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48
Wind noise is generated when air (wind) hits the diaphragm of the microphone body 310
directly. As described above, first, the movement of air entering the second space SP20 is
suppressed by the second space SP20 (elastic foam 140), and the air entering the first space
SP10 by the first space SP10. Reduce the movement of As described above, since the movement
of the air is suppressed by the first space SP10 and the second space SP20, the air can be less
likely to leak toward the gun microphone 300, and the movement of the air is transmitted to the
diaphragm of the microphone body 310 of the gun microphone 300 It can be difficult to prevent
wind noise.
[0186]
<Suppressing Negative Pressure Fluctuation of First Space SP10 and Second Space SP20> As
described above, air flows into the microphone body 310 of the gun microphone 300 to vibrate
the diaphragm, thereby generating wind noise. Furthermore, wind noise is caused not only by
such direct air inflow but also by fluctuations in ambient pressure.
[0187]
That is, a slight pressure fluctuation, specifically a negative pressure fluctuation, occurs around
the gun microphone 300, and the diaphragm of the microphone body 310 may be vibrated by
the negative pressure fluctuation to generate wind noise. The gun microphone windshield 100
can also suppress such negative pressure fluctuation, and can prevent the generation of wind
noise due to the negative pressure fluctuation.
[0188]
First, when negative pressure fluctuation occurs in the second space SP20 due to air flowing
outside the basket 150, movement of air in the longitudinal direction in the second space SP20
(elastic foam 140) and The movement of air in the circumferential direction is caused to suppress
negative pressure fluctuation in the second space SP20. By suppressing the negative pressure
fluctuation in the second space SP20, it is possible to prevent the negative pressure fluctuation
from occurring in the first space.
03-05-2019
49
[0189]
Furthermore, even if negative pressure fluctuation of the second space SP20 is transmitted to the
first space SP10 and negative pressure fluctuation occurs in the first space SP10, as described
above, in the first space SP10 The movement of the air in the longitudinal direction and the
movement of the air in the circumferential direction are caused to suppress the negative pressure
fluctuation in the first space SP10. By suppressing the negative pressure fluctuation in the first
space SP10, it is possible to prevent the negative pressure fluctuation from being transmitted to
the diaphragm of the gun microphone 300.
[0190]
In each of the first space SP10 and the second space SP20, the negative pressure fluctuation can
be suppressed by positively generating the movement of the air in the longitudinal direction and
the movement of the air in the circumferential direction. The second space SP20 (elastic foam
140) has an elongated shape and can sufficiently move air in the longitudinal direction, and the
second sound transmitting body 120 and the third sound transmitting body 130 and the third
space By moving the elastic foam 140 into contact with the air, the moved air can be gradually
decelerated.
[0191]
Furthermore, the first space SP10 also has an elongated shape, and can move air sufficiently in
the longitudinal direction, and the air comes in contact with the first sound transmitting body
110 and the second sound transmitting body 120. Air can be decelerated gradually.
[0192]
The gun microphone windshield 100 has a first space SP10 and a second space SP20, and
absorbs negative pressure fluctuation by sufficiently moving air in the longitudinal direction and
decelerating the moved air. it can.
Thus, negative pressure fluctuation can be suppressed stepwise by functioning the first space
SP10 and the second space SP20 as a buffer area of two stages.
03-05-2019
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[0193]
Thus, by forming the first space SP10 and the second space SP20, the gun microphone
windshield 100 can make air less likely to leak to the gun microphone 300, and wind noise
generated by vibrating the diaphragm can be eliminated. It can prevent.
[0194]
Furthermore, even if the air does not enter the gun microphone 300, the diaphragm may be
vibrated by negative pressure fluctuation caused by the air flowing around the gun microphone
300.
Even in such a case, negative pressure fluctuation can be suppressed by forming the first space
SP10 and the second space SP20, and the generation of wind noise due to negative pressure
fluctuation can also be prevented.
[0195]
As described above, the first space SP10 and the second space SP20 can suppress not only the
movement of air but also the occurrence of negative pressure fluctuation.
[0196]
<< Grip Antivibration Structure 400 >> FIG. 11 is a side view showing the basket 150 and the
grip antivibration structure 400. As shown in FIG.
FIG. 12 is a perspective view showing the basket 150 and the grip and vibration control structure
400. As shown in FIG. FIG. 13 is an enlarged side view showing the structure of the grip portion
410. As shown in FIG. FIG. 14 is a perspective view showing the entire grip and vibration control
structure 400. As shown in FIG. FIG. 15 is a front view showing a state in which the first sound
transmitting body 110 and the second sound transmitting body 120 are attached to the elastic
holding body 434. As shown in FIG. FIG. 16 is a perspective view showing a state in which the
first sound transmitting member 110 is attached to the elastic holder 434. As shown in FIG. FIG.
17 is a perspective view showing the end of the basket 150. As shown in FIG.
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51
[0197]
The anti-glare structure 400 can be detachably attached to the basket 150 of the windshield 100
for a gun microphone. The grip and vibration control structure 400 has a grip portion 410 and a
holding portion 430.
[0198]
By holding and supporting the grip portion 410 by the hand, the user can position the gun
microphone 300 together with the gun microphone windshield 100 toward a desired sound
source. The user can hold the gun microphone 300 indirectly via the gun microphone windshield
100 by means of the grip portion 410, so that it is possible to prevent the shock and solid sound
generated during use from being transmitted directly to the gun microphone 300.
[0199]
Furthermore, the holding portion 430 of the grip and vibration control structure 400 attenuates
the impact and solid sound applied to the gun / microphone windshield 100. It is made for the
impact and solid sound not to be picked up by the gun microphone 300 as noise. The grip and
vibration control structure 400 has a grip portion 410 and a holding portion 430.
[0200]
<Slit 158> As shown in FIG. 12, the basket 150 is formed with a slit 158 along the longitudinal
direction of the basket 150. As shown in FIG. The slit 158 is formed from the second end 156 b
of the basket 150 to a locking position 160 formed in the middle of the basket 150. By attaching
the grip portion 410 and the holding portion 430 so as to sandwich the basket 150 via the slit
158, the grip and vibration control structure 400 can be provided detachably on the basket 150.
[0201]
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52
<Grip Part 410> The grip part 410 mainly has a grip 412, a connector 414 and a vibration
absorber 416. The grip 412 and the connector 414 are disposed outside the basket 150 when
the grip and vibration control structure 400 is attached to the basket 150.
[0202]
The grip 412 is a member that can be grasped by the user of the gun microphone 300 and the
windshield 100 for the gun microphone by hand. By holding the grip 412 by the user, the gun
microphone 300 and the gun microphone windshield 100 can be directed in a desired direction.
[0203]
The coupling body 414 is provided so that the grip 412 can be rotated. For example, the grip
412 is rotatably attached to the connector 414 by a locking member such as a bolt and a nut. By
rotatably attaching the grip 412 to the connector 414, the angle between the gun microphone
300 and the windshield 100 for the gun microphone and the grip 412 can be made as desired by
the user, and the gun microphone 300 can be used as a sound source at high and low positions.
It can be turned.
[0204]
Also, the connector 414 has an elongated shape and can be attached to the outer surface of the
basket 150 along the longitudinal direction. The coupling body 414 can be attached to the
coupling support 432 of the holder 430, as described later.
[0205]
The vibration absorber 416 is made of an elastically deformable resin such as rubber. The
vibration absorber 416 has a long plate-like shape. The vibration absorber 416 is provided
between the connector 414 and the outer surface of the basket 150 so as to be in contact with
the basket 150. The shock absorber and the solid sound are absorbed to some extent by the
vibration absorber 416, so that the shock and the solid sound are less likely to be transmitted to
03-05-2019
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the holding portion 430.
[0206]
<Holding part 430> The holding part 430 mainly includes a connection support 432, an elastic
holding body 434 and a bracket 440. The connection support 432, the elastic support 434 and
the bracket 440 are disposed inside the basket 150 when the grip and vibration isolation
structure 400 is attached to the basket 150.
[0207]
The connection support 432 has an elongated shape and can be attached to the inner surface of
the basket 150 along the longitudinal direction. The coupling body 414 of the grip portion 410
is disposed longitudinally on the outer surface of the basket 150, and the coupling support 432
is disposed longitudinally on the inner surface of the basket 150. The connector 414 and the
connection support 432 are disposed to face each other via the slit 158. The coupling body 414
has a plurality of openings (not shown), and the coupling support 432 has a plurality of screw
holes (not shown) corresponding to the openings of the coupling body 414. By screwing a screw
(not shown) into the screw hole of the connection support 432 through the opening of the
connection body 414, the holding portion 430 can be detachably attached to the holding portion
410, and a grip and vibration-proof structure 400 can be provided removably on the basket 150.
[0208]
The elastic holder 434 is attached to the connection support 432. The elastic holding body 434
has an inner arc body 436 and an outer arc body 438. The radius of the inner arc body 436 is
smaller than the radius of the outer arc body 438, and the elastic holding body 434 has a shape
in which the inner arc body 436 and the outer arc body 438 are connected. The outer arc 438 is
attached to the connection support 432. The inner arc body 436 is attached to a bracket 440
described later.
[0209]
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54
The inner arc body 436 and the outer arc body 438 are both formed of an elastically deformable
resin. The elastic deformation of the inner arc body 436 and the outer arc body 438 absorbs
external impact and solid sound, and the impact and solid sound can be prevented from being
transmitted to the gun microphone 300, and can not be picked up as noise. The function of the
elastic holding body 434 will be described later.
[0210]
A bracket 440 is attached to the inner arc body 436. The bracket 440 has an elongated shape,
and has a substantially cylindrical shape in which a slit is formed on the side surface.
[0211]
The first sound transmitting body 110 is attached to the inside of the bracket 440, and the
second sound transmitting body 120 is attached to the outside of the bracket 440. By attaching
and forming the first sound transmitting body 110 and the second sound transmitting body 120
on the bracket 440, the first sound transmitting body 110 and the second sound transmitting
body 120 are maintained in a predetermined shape. Can.
[0212]
Further, by attaching the first sound transmitting body 110 and the second sound transmitting
body 120 with the bracket 440 interposed therebetween, the first sound transmitting body 110
and the second sound transmitting body 120 are firstly attached. The space SP1 can be stably
formed, and the volume of the first space SP1 can be maintained constant.
[0213]
As described above, the first sound transmitting body 110 has an elongated and substantially
cylindrical shape.
Rings 450 are provided at a plurality of locations along the outer longitudinal direction of the
first sound transmitting body 110. The ring 450 can prevent the first sound transmitting body
03-05-2019
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110 from being deformed to be narrowed. Further, by applying an adhesive to the inside of the
ring 450, it is possible to prevent the first sound transmitting body 110 from being displaced in
the longitudinal direction. By providing the plurality of rings 450, the gun microphone 300 can
be stably held and easily detached while maintaining the shape of the first sound transmitting
member 110 constant. An adhesive may be applied to the inside of the ring 450 by providing
another ring (not shown) inside the first sound transmitting body 110 to support the first sound
transmitting body 110. It is also possible to prevent the deformation that makes the first sound
transmitting member 110 narrow.
[0214]
In addition, an opening (not shown) is formed in the ring 450, and sound can be transmitted
through the opening. As described above, the gun microphone 300 is disposed inside the first
sound transmitting member 110. By using the ring 450 in which the opening is formed, the
sound transmission characteristics of the first sound transmitting body 110 can be maintained.
[0215]
As described above, the elastic holding body 434 is provided with the inner arc body 436 and
the outer arc body 438. As shown in FIG. The inner arc 436 and the outer arc 438 elastically
deform in response to the applied force. The grip 412 may be gripped by the operator, and an
impact may be applied to the grip 412 by changing the direction of the gun microphone 300 or
changing its position. In addition, solid sound generated by wind and propagating through the
solid as vibration is collected as wind noise.
[0216]
The gun and microphone windshield 100 has a vibration absorber 416 and an elastic support
434. Shock and solid sound can be attenuated by the vibration absorber 416 and the elastic
support 434 and can not be transmitted to the gun microphone 300. The functions of the
vibration absorber 416 and the elastic holder 434 will be described below.
[0217]
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<Function of Vibration Absorber 416> The vibration absorber 416 is made of resin such as
rubber and elastically deformed. The vibration absorber 416 is provided between the connector
414 and the outer surface of the basket 150 so as to be in contact with the basket 150. The
shock or solid sound applied to the grip 412 is attenuated by the repeated elastic deformation of
the vibration absorber 416 and gradually absorbed by the vibration absorber 416. Since the
shock and solid sound are absorbed by the vibration absorber 416, it is possible to make it
difficult for the shock and solid sound to be transmitted to the holding portion 430.
[0218]
<Function of Elastic Holding Body 434> The elastic holding body 434 is provided with an inner
arc body 436 and an outer arc body 438. The inner arc 436 and the outer arc 438 elastically
deform in response to the applied force. The grip 412 may be gripped by the operator, and an
impact may be applied to the grip 412 by changing the direction of the gun microphone 300 or
changing its position. Also, solid sounds may be added.
[0219]
The inner arc body 436 and the outer arc body 438 are made of resin and can be elastically
deformed. The shock and solid sound transmitted through the connection support 432 are first
transmitted to the outer arc body 438. The outer arc body 438 is elastically deformed by the
impact and the impact gradually attenuates. Even when an impact is transmitted from the outer
arc body 438 to the inner arc body 436, similarly, the inner arc body 436 is elastically deformed
by the impact and gradually attenuates the impact. Even when the shock is transmitted to the
elastic support 434 through the connection support 432, the inner arc 436 and the outer arc
438 can prevent the shock from being transmitted to the bracket 440, and the noise is collected
to the gun microphone. You can make it not sound. Also, in the process of transmitting the solid
sound also as vibration through the outer arc body 438 and the inner arc body 436, vibration
energy is gradually absorbed and attenuated.
[0220]
<<<< Second Embodiment >>>> In the gun microphone windshield 100 according to the first
embodiment, the elastic foam 140 is provided in the second space SP20. On the other hand, the
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elastic foam 140 may not be provided in the second space SP20.
[0221]
<<< Wind 200 for Gun Microphone >>> As shown in FIGS. 7, 8 and 9, in the windshield 200 for a
gun microphone according to the second embodiment, both the first space SP10 and the second
space SP20 are used. The elastic foam 140 is not provided. The difference between the
configuration of the gun microphone windshield 200 according to the second embodiment and
the configuration of the gun microphone windshield 100 according to the first embodiment is
the presence or absence of the elastic foam 140. That is, the first sound transmitting body 110,
the second sound transmitting body 120, the third sound transmitting body 130, and the basket
150 have the same shape, material, and function, and are similarly arranged. The same symbols
as in the form are attached.
[0222]
Further, similarly to the gun microphone windshield 100 according to the first embodiment, a
first space SP10 is defined in a region sandwiched between the first sound transmitting body
110 and the second sound transmitting body 120. A second space SP20 is defined in a region
sandwiched between the second sound transmitting body 120 and the third sound transmitting
body 130.
[0223]
The distance DT10 between the first sound transmitting member 110 and the second sound
transmitting member 120 and the distance DT20 between the second sound transmitting
member 120 and the third sound transmitting member 130 are the presence or absence of the
elastic foam 140. It can be determined appropriately according to
[0224]
Further, in the gun / microphone windshield 200 according to the second embodiment as well as
the gun / microphone windshield 100 according to the first embodiment, the air that has entered
the first space SP10 moves along the longitudinal direction. The air having LP 10 (see FIGS. 6A
and 10) and component AP10 (see FIGS. 6B and 10) moving along the circumferential direction
moves air that has entered the second space SP20 along the longitudinal direction. Component
LP20 (see FIGS. 6A and 10) and component AP20 (see FIGS. 6B and 10) moving along the
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circumferential direction.
[0225]
By appropriately setting the spacing of the first space SP10 and the spacing of the second space
SP20, the component LP10 moving along the longitudinal direction, the component AP10
moving along the circumferential direction, and the movement along the longitudinal direction
By generating the component LP20 and the component AP20 moving along the circumferential
direction, air can not easily enter the gun microphone 300, and the wind noise can be cut off
properly.
[0226]
<<< Modification Example> In the first embodiment, the elastic foam 140 is provided only in the
second space SP20, and the elastic foam 140 is not provided in the first space SP10.
In the second embodiment, the elastic foam 140 is not provided in both the first space SP10 and
the second space SP20.
[0227]
In addition, the elastic foam 140 is provided only in the first space SP10, and the elastic foam
140 is not provided in the second space SP20, or in both the first space SP10 and the second
space SP20. The elastic foam 140 can be provided.
[0228]
In any case, according to the presence or absence of the elastic foam 140, the component LP10
moving along the longitudinal direction by appropriately setting the intervals of the first space
SP10 and the intervals of the second space SP20, and the circumferential direction The air does
not easily enter the gun microphone 300 by generating the component AP10 moving along the
longitudinal axis, the component LP20 moving along the longitudinal direction, and the
component AP20 moving along the circumferential direction, and the wind noise is properly
adjusted. Can be cut off.
[0229]
100 gun microphone windshield 110 first sound transmitting body 120 second sound
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transmitting body 130 third sound transmitting body 140 elastic foam 150 basket 300 gun
microphone SP10 first space SP20 second space
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