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JP2007134955

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DESCRIPTION JP2007134955
The present invention provides an array speaker suitable for delivering sound to an area having a
depth and a height difference. SOLUTION: The speaker modules are arranged in the vertical
(vertical) direction and the horizontal direction so that the directivity directions of the respective
speaker modules are substantially parallel, and the speaker modules 10 arranged in the
horizontal direction as being upward in the vertical (vertical) direction. The speaker modules 10
are arranged to increase the number. By arranging the speaker modules 10 so that the number
of the speaker modules 10 arranged in the horizontal direction increases as the vertical (vertical)
direction is increased, in the array speaker 1, the surface sound source, the line sound source,
and the point Form with the sound source. [Selected figure] Figure 1
Speaker device
[0001]
The present invention relates to an array speaker configured by a plurality of speakers.
[0002]
There is known an array speaker in which a plurality of speakers are arranged in a line (see
Patent Document 1).
The array speaker is a linear sound source when outputting sound, and when the speakers are
arranged in the vertical direction, there is no radiation of unnecessary sound in the vertical
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direction, so it is possible to suppress reverberation and reflected sound in the room. Clear,
louder can be done further away. In addition, the array speaker has small distance attenuation,
and the volume difference is reduced between the positions near and far from the speaker.
Therefore, even when used in large places with large depths such as large gymnasiums and
various halls, the sound can be delivered far.
[0003]
However, there are the following problems when used in a large area where the audience is
stepped like an arena or concert hall. For example, if array speakers are installed on the left and
right above the stage to allow sound to reach the rear row of audience seats, the directivity angle
in the vertical direction is narrow. If the array speakers are placed at the same height as the stage
in order to prevent the sound from reaching the front row of audiences, the sound will not reach
the rear row of seats.
[0004]
According to Patent Document 1, in order to allow sound to reach a stair-shaped passenger seat,
an array speaker having the same height as the height from the lowermost passenger seat to the
uppermost passenger seat is installed, and the stage and the last row It is disclosed that the array
speaker is inclined in accordance with an angle formed by a straight line connecting to a
passenger seat and a horizontal plane. However, in a large hall such as a concert hall, there is a
hall equipped with a second floor and a third floor, and trying to install an array speaker
according to such a seat, the height of the speaker becomes very high, Assembly becomes
difficult. In addition, even if the array speaker is tilted, it is difficult to deliver the sound to all the
seats in the hall provided with the second floor and the third floor because the directivity angle
in the vertical direction is narrow.
[0005]
As a technique for solving such a problem, for example, Non-Patent Document 1 discloses a
technique for arranging loudspeakers so that the row of loudspeakers draws an arc when viewed
from the side. In the array speaker of this aspect, the lower speaker is directed to the front row of
audience seats, and the upper speaker is directed to the rear row of crowdability. The sound can
be delivered to a certain audience and the audience on the second and third floor seats. Patent
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2
Document 1: JP-A-2002-199484 Gazette by David Junness (Japanese Edition: Acoustic Technical
Co., Ltd.), "Technical Description of Touring Line Array", [online], search May 16, 2005, Internet
<URL ; Http://www.otk.co.jp/history/tech/gunness.pdf>
[0006]
By the way, in the array speaker in which the speakers are arranged in a line, the directivity
angle in the horizontal direction is constant from the upper speaker to the lower speaker. If the
directional angle is set to reach the front row of seats, the directional angle becomes too wide at
the rear row of seats, and the sound is reflected to the wall to reduce the sound clarity. On the
other hand, when the directivity angle is adjusted in accordance with the rear row passenger
seats, the directivity angles become narrow in the front row passenger seats, and it becomes
impossible to deliver sound to the left and right front passenger seats. Although Non-Patent
Document 1 discloses a technology relating to the sound emission in the vertical direction, it
does not mention the radiation of sound in the horizontal direction, and the array speaker
disclosed in Non-Patent Document 1 does not. , Did not properly deliver the sound to the front
and back row audience.
[0007]
The present invention has been made under the above-described background, and it is an object
of the present invention to provide an array speaker suitable for delivering sound to an area
having a depth and a height difference.
[0008]
In order to solve the problems described above, the present invention is a speaker device
provided with a plurality of speakers, which has a plurality of speakers arranged in the vertical
direction and the horizontal direction, and emits a sound from the speakers. It has a surface
sound source unit to be a sound source and a plurality of speakers arranged in a line in the
vertical direction, and has a line sound source unit to be a line sound source when sound is
emitted from the speaker, and a speaker And a point sound source unit serving as a point sound
source when emitting sound, the line sound source unit being continuous in the vertical direction
of the surface sound source unit, and the point sound source unit being continuous in the vertical
direction of the line sound source unit There is provided a speaker apparatus characterized in
that the directivity directions of a plurality of speakers are substantially parallel to a horizontal
direction.
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[0009]
In a preferred embodiment of this speaker device, the number of speakers arranged in the
horizontal direction may be reduced as going from the top to the bottom in the vertical direction.
In addition, a plurality of loudspeaker arrays in which a plurality of loudspeakers are arrayed
along the vertical direction are provided adjacent to each other in left and right symmetry, and
the number of loudspeakers in each loudspeaker array aligned in the left and right symmetry It
decreases as it goes from the row of the left to the row of the left and right ends, and the upper
ends of the speaker rows may be aligned.
In a preferred aspect of this speaker device, each of the plurality of speakers has a hexagonal
pillar-shaped speaker box for each set of one or a plurality of speakers, and the directions of the
central axes of the plurality of hexagonal pillar-shaped speaker boxes are substantially parallel. It
may be Further, in a preferable aspect of this speaker device, the pointing direction of the point
sound source may be inclined downward with respect to the horizontal direction. Further, in a
preferable aspect of this speaker device, the pointing direction of the linear sound source may be
inclined downward with respect to the horizontal direction.
[0010]
According to the present invention, sound can be properly delivered to an area with depth and
height difference.
[0011]
Hereinafter, embodiments of the present invention will be described with reference to the
drawings.
FIG. 1B is a front view of the right half of the array speaker 1 according to the embodiment of the
present invention, and FIG. 1A is a side view of the array speaker 1 according to the embodiment
of the present invention. The speaker module 10 constituting the array speaker 1 includes a boxshaped speaker box 11, a woofer 12 which is a speaker for reproducing the low frequency range,
and a tweeter 13 which is a speaker for reproducing the high frequency range.
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[0012]
In the array speaker 1, as shown in FIG. 1, each of the plurality of speaker modules 10 is
arranged in the vertical (vertical) direction and the horizontal direction such that the directivity
directions of the speaker modules are substantially parallel. . Specifically, a first line L1 in which
n1 speaker modules 10 are arranged in the vertical direction, a second line L2 in which n2
speaker modules 10 are arranged in the vertical direction, and n3 speaker modules 10 in the
vertical direction And the fourth line L4 in which the n4 speaker modules 10 are arranged in the
vertical direction are arranged in the horizontal direction (n1> n2> n3> n4: n1 to n4 are integers)
.
[0013]
Further, in the array speaker 1, ten speaker modules are arranged so that the upper ends of the
respective lines are aligned, and the second line L2 is next to the first line L1 and the third line
L3 is next to the second line L2. The speaker modules 10 are arranged next to the 3-line L3, such
as a fourth line L4. Since the number of speaker modules 10 constituting each line is different,
the number of speaker modules 10 combined in the horizontal direction increases as the vertical
(vertical) direction increases, and the speaker modules 10 combined in the horizontal direction
decrease as they decrease. The speaker modules 10 are arranged so as to reduce the number of.
Thus, when the speaker modules 10 are arranged such that the number of the speaker modules
10 arranged in the horizontal direction increases as the vertical (vertical) direction is upward, the
inside of the first area A1 shown in FIG. In the second embodiment, a surface sound source is
formed because the speaker modules 10 are arranged in a rectangular shape, and a linear sound
source is formed in the second area because the speaker modules 10 are arranged substantially
linearly in the vertical direction. , Point sound source is formed.
[0014]
The sound emitted from the point sound source has distance attenuation compared to the linear
sound source, but the sound is emitted from the sound source in a spherical shape, so the
directivity angles in the vertical direction and the horizontal direction become wide. This pointing
angle will be described with reference to FIGS. FIG. 2 is an example of a plan view of the concert
hall, and FIG. 3 is a view of the concert hall illustrated in FIG. 2 as viewed from the side of the
stage. In Figs. 2 and 3, the distance from the stage to the stage is 20m, the distance from the
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stage to the stage is 30m, and the distance from the stage to the stage is 30m. It is assumed that
the distance between the far audience and the audience near the stage is 14 meters. When the
array speaker 1 having a point sound source is installed on the left and right of the stage as
shown in FIG. 2, the sound emitted from the point sound source has a wide directional angle in
the horizontal direction. Are emitted to the area B1. Further, as shown in FIG. 3, when the array
speaker 1 is installed above the stage, the sound radiated from the point sound source located
below the array speaker 1 has a wide directivity angle in the vertical direction, and It is widely
emitted and emitted to an area C1 close to the stage.
[0015]
Further, in the sound radiated from the line sound source, the directivity angle in the vertical
direction becomes narrower than the directivity angle in the vertical direction of the point sound
source. Further, since the width in the horizontal direction is slightly wider than the point sound
source in the horizontal direction, the horizontal directivity angle of the line sound source is
slightly narrower than the point sound source. Therefore, when the array speaker 1 having a
linear sound source is installed on the left and right of the stage as shown in FIG. 2, the sound
radiated from the linear sound source is radiated at a slightly narrower directivity angle in the
horizontal direction than the point sound source It is emitted to the area B2 indicated by the
dashed line. Further, as shown in FIG. 3, when the array speaker 1 is installed above the stage,
the line sound source is located above the point sound source and the directivity angle in the
vertical direction is narrow. , The area C2, i.e., the area in the area C1 is radiated to the area
below the area C1.
[0016]
In addition, the sound emitted from the surface sound source has less distance attenuation both
in the vertical direction and in the horizontal direction, and the horizontal and vertical directivity
angles become narrower. Therefore, when the array speaker 1 having a surface sound source is
installed on the left and right of the stage as shown in FIG. 2, the sound emitted from the surface
sound source is emitted at a narrow directivity angle in the horizontal direction from the line
sound source It is emitted to the indicated area B3. Further, as shown in FIG. 3, when the array
speaker 1 is installed above the stage, the surface sound source is located above the line sound
source, and the directivity angle in the vertical direction is narrow. , The area C3, i.e., the area in
the area C2 is radiated to the area below the area C2.
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[0017]
Note that the pointing angles in the vertical and horizontal directions of the sound emitted from
the point sound source, the line sound source, and the surface sound source are the size of the
hole, the arrangement position of the array speaker 1, the arrangement number of the array
speaker 1, the array speaker The directivity angle of the point sound source in the vertical
direction is about 60 degrees to 90 degrees, and the directivity angle in the horizontal direction
is about 90 degrees to 120 degrees, though it varies depending on the arrangement of the
speaker modules. Further, the directional angles in the vertical direction of the linear sound
source and the surface sound source are about 15 degrees to 30 degrees, and the directional
angles in the horizontal direction are about 30 degrees to 60 degrees. In Figs. 2 and 3, the
horizontal directivity angle of the surface sound source is about 40 °, the horizontal directivity
angle of the linear sound source is about 60 °, and the horizontal directivity angle of the point
sound source is about 120 °. The horizontal directional angle of the sound source is about 15
°, the horizontal directional angle of the linear sound source is about 15 °, and the horizontal
directional angle of the point sound source is about 50 °.
[0018]
As described above, according to the present embodiment, even if there are depth and height
differences in the hall seats, clear sounds can be emitted to the respective seats.
[0019]
[Modifications] Although the embodiment of the present invention has been described above, the
present invention is not limited to the above-described embodiment, and can be practiced in
various other forms.
For example, the above-described embodiment may be modified as follows to implement the
present invention.
[0020]
In the embodiment described above, the speaker modules 10 having the box-shaped speaker box
11 are arrayed, but the shape of the speaker box is not limited to the box, and other shapes such
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as a polygonal pillar or a cylindrical shape The speaker box of may be used. Further, for example,
the shape of the speaker box 11 is a hexagonal column, and as shown in FIG. 4, the speaker
modules are arranged in the vertical direction and the horizontal direction so that the central
axes of the speaker boxes are substantially parallel. It is also good.
[0021]
The number of the speaker modules 10 arranged in the vertical direction and the horizontal
direction is not limited to the number shown in FIG. The number of the speaker modules 10
arranged in the vertical direction and the horizontal direction can be determined according to the
size of the hall, the height difference of the audience seat, the size of the speaker module 10, the
arrangement position of the array speaker 1, and the like. In addition, a suitable directional angle
can be obtained according to the size of the hole and the inclination angle of the sound receiving
surface, and the size of the speaker module 10 constituting the surface sound source, the line
sound source and the point sound source and the arrangement position of the array speaker 1 It
may be different from the embodiment described above.
[0022]
In the embodiment described above, the array speaker is configured by arranging a plurality of
speaker modules. However, even if a plurality of speakers (the woofer 12 and the tweeter 13 are
arrayed to configure the array speaker 1 in one speaker box) Good.
[0023]
In an array speaker which is a line sound source, directivity can be controlled by controlling a
signal supplied to each speaker module 10.
Also in the present embodiment, the directivity may be controlled to radiate the sound from the
line sound source downward. In the case of this aspect, it is possible not to provide a speaker that
constitutes a point sound source. Also in the present embodiment, as described in Non-Patent
Document 1, the speaker modules 10 are arranged such that the row of the speaker modules 10
draws an arc when viewed from the side, and the directivity angle is wide particularly with
respect to point sound sources. May be made easier.
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[0024]
The speaker modules 10 serving as point sound sources may be arranged in the vertical direction
of the line sound source at a predetermined distance instead of being connected to the speaker
module group serving as the line sound source. In addition, the speaker module to be a point
sound source may be different in size from the speakers included in the linear sound source and
the speaker module configuring the surface sound source. In addition, the speaker module
serving as a point sound source may have the size of the speaker box different (for example,
smaller) from the sizes of the linear sound source and the speaker modules constituting the
surface sound source.
[0025]
FIG. 1 is an external view of an array speaker according to an embodiment of the present
invention. It is a figure explaining the directional angle of the horizontal direction of the same
array speaker. It is a figure explaining the directivity angle of the perpendicular direction of the
array speaker. It is a front view of an array speaker concerning an embodiment of the present
invention.
Explanation of sign
[0026]
1・・・アレイスピーカ、10・・・スピーカモジュール、11・・・スピーカボックス、
12・・・ウーファー、13・・・ツィーター。
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