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JP2010206415

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
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DESCRIPTION JP2010206415
The present invention provides a fixing device capable of accurately maintaining the positional
relationship of five microphones, fixing five microphones and one camera together, and
improving the accuracy of sound source position estimation. A first microphone fixing portion for
fixing four microphones, a second microphone fixing portion for fixing one microphone, a
camera mounting portion, a camera mounting portion, and a first microphone fixing portion A
microphone fixing part, the first microphone fixing part is provided with a fixing hole for fixing
the shaft part by penetrating the microphone shaft part, the microphone from the fixing hole A
fixing device characterized in that it is fixed to a microphone fixing part by a microphone fixing
part so as to prevent a pullout. [Selected figure] Figure 1
Fixing device
[0001]
According to the present invention, it is possible to accurately maintain microphones and
cameras used in a sound source estimation method for estimating a sound source using sound
data collected by a plurality of microphones and image data captured by a camera at a
predetermined relative position. It relates to an apparatus.
[0002]
Conventionally, as a method of estimating the direction of arrival of sound, a microphone array in
which a large number of microphones are arranged at equal intervals is constructed, and the
direction of the sound source, which is the direction of arrival of sound waves, is estimated from
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the phase difference of each microphone with respect to the reference microphone. A so-called
acoustic method has been devised (see, for example, Non-Patent Document 1).
On the other hand, rather than from the phase difference of the output signals of the plurality of
microphones arranged at the measurement point, a plurality of microphone pairs arranged in a
straight line crossing each other from the plurality of microphones constitute a pair of
microphones There has been proposed a method of estimating the direction of a sound source
from the ratio of the arrival time difference corresponding to the phase difference and the arrival
time difference between the other two microphones (see, for example, Patent Documents 1 to 3).
Specifically, as shown in FIG. 15, two microphone pairs (M1, M3) and microphone pairs (in which
four microphones M1 to M4 are arranged at predetermined intervals on two straight lines
orthogonal to each other) M2, M4) are arranged to form a phase difference between sound
pressure signals input to the microphones M1, M3 constituting the microphone pair (M1, M3),
and a microphone constituting the microphone pair (M2, M4) The horizontal angle θ between
the measurement point and the position of the sound source is estimated from the ratio to the
arrival time difference of the sound pressure signal input to M2 and M4, and the fifth
microphone M5 is not on the plane made by the microphones M1 to M4. 4 microphone pairs
(M5, M1), (M5, M2), (M5, M3), (M5, M4) are further arranged in the position, and each of the
above microphones The elevation angle φ between the measurement point and the position of
the sound source is estimated from the arrival time difference between the microphones forming
the lophone pair. Thus, the direction of the sound source can be accurately estimated with a
smaller number of microphones, as compared to the case of estimating the direction of the sound
source using the microphone array. Also, at this time, after image capturing means such as a CCD
camera is provided to capture an image of the direction of the above estimated sound source,
data of this image and data of the direction of the sound source are synthesized and the above
estimation is made in the image. By displaying a figure of the sound source direction and the
sound pressure level, it is possible to visually grasp the sound source.
[0003]
JP 2002-181913 A JP JP 2006-324895 A JP JP 2008-224259 A
[0004]
Juro Oga, Yoshio Yamazaki, Yutaka Kanada, Acoustic System and Digital Processing,
Corona,1995
[0005]
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Conventionally, the five microphones could not be accurately maintained in the positional
relationship as shown in FIG.
The present invention provides a fixing device capable of accurately maintaining the positional
relationship of five microphones and fixing five microphones and one camera together to
improve the accuracy of sound source position estimation.
[0006]
A fixing device according to the present invention fixes a microphone and a camera used in a
sound source estimation method for estimating a sound source using data of sound collected by a
plurality of microphones and data of an image photographed by a camera at a predetermined
relative position. A first microphone fixing portion for fixing four microphones, a second
microphone fixing portion for fixing one microphone, a camera attachment portion, a camera
attachment portion, and first and second ones. A support frame for supporting the microphone
fixing part, and a microphone fixing part, in the first microphone fixing part, the centers of the
sound collecting parts of one pair of two microphones are separated by a predetermined distance
on a first straight line One pair of two microphones are fixed to be positioned at the same time as
the other pair of two microphones The other pair of two microphones are fixed so that the center
of the collection unit is positioned at a predetermined distance on a second straight line
orthogonal to the first straight line, and one second microphone fixing unit One microphone is
fixed so that the center of the sound collecting unit of the microphone is located at a position
distant from the square plane connecting the centers of the sound collecting units of the four
microphones, and the camera , And fixed at a position where it is possible to pick up an image of
the sound source position estimated from the phase difference of the output signals of the
microphones, and the first and second microphone fixing portions penetrate the shaft of the
microphone The microphone is fixed to the microphone fixing part by the microphone fixing part
so that the microphone is prevented from pulling out from the fixing hole. The positional
relationship between the Kurofon be maintained accurately, and since the five microphone and
one camera can be fixed together, it is possible to improve the accuracy of the source position
estimation.
Since the first and second microphone fixing portions include the fixing holes and the notches
penetrating through the inner peripheral surface of the fixing holes and the outer peripheral
surface of the fixing portion, the microphone shaft portion and the electric wire cable of the
microphone are cut. Since the microphone can be inserted into the fixing hole through the notch,
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the fixing operation of the microphone can be simplified, and the complexity in the fixing
operation of the microphone can be eliminated. The microphone is provided with an insulating
part, and the microphone is electrically connected to the input signal of the microphone since the
shaft and the microphone fixing part are insulated by the microphone insulating part in a state
where the shaft of the microphone penetrates the fixing hole of the microphone fixing part. Noise
can be prevented from mixing. An outer peripheral surface of the microphone shaft portion and
an inner peripheral surface of the hole of the upper insulating component in a state where the
microphone insulating component includes the upper insulating component and the lower
insulating component and the shaft portion of the microphone penetrates the hole of the upper
insulating component The small diameter part which is glued and the upper insulating part is
located inside the fixing hole and insulates the inner peripheral surface of the fixing hole from
the shaft of the microphone, and the upper surface of the fixing part around the fixing hole
contacts and fixes A lower surface for insulating the upper surface of the microphone and the
shaft of the microphone and preventing the microphone from falling off from the fixing hole, and
the lower insulating component contacts the lower surface of the fixing portion around the fixing
hole and Insulating the microphone shaft from the shaft prevents electrical noise from being
mixed in with the input signal of the microphone, and the upper insulating part bonded to the
shaft of the microphone is fixed around the fixing hole. By parts top engages, coming off
downward microphone is prevented. Since the first microphone fixing portion and the second
microphone fixing portion are formed of the insulating material, it is possible to prevent the
mixing of electrical noise in the input signal of the microphone without using the microphone
insulating component.
[0007]
(A) is a plan view of the fixing device main body, (b) is a front view of the sound and video
collecting unit, (c) is a right side view of the sound and video collecting unit (Form 1). (A) is a top
view of the upper side insulation component which comprises a microphone insulation
component, (b) is sectional drawing of an upper side insulation component (form 1). (A) is a top
view of the lower insulating component which comprises a microphone insulating component, (b)
is sectional drawing of a lower insulating component (form 1). (A) is a plan view of a microphone
fixing component, (b) is a cross-sectional view of the microphone fixing component (Form 1). (A)
is a disassembled perspective view of a fixing device main body, (b) is an assembly procedure
figure which shows the state in which the base and the support frame were assembled ¦ attached
(form 1). (A) is an assembly procedure diagram showing a state in which the microphone pair
fixing portion and the support frame are assembled, (b) is an assembly procedure diagram
showing a state in which the fifth microphone fixing portion and the support frame are
assembled 1). (A) is an exploded perspective view showing the relationship between the fixing
hole of the microphone pair fixing part of the fixing device, the microphone, the microphone
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insulating part and the microphone fixing part, (b) is one of the fixing holes of the microphone
pair fixing part The assembly point perspective view which shows the state to which the
microphone was fixed (form 1). (A) is a disassembled perspective view which decomposes ¦
disassembles and shows a fixing device, a camera, and a stand apparatus, (b) is a perspective
view which shows an audio ¦ voice and an imaging ¦ video collection unit (form 1). (A) is a plan
view of the fixing device main body, (b) is a front view of the sound and video collecting unit, (c)
is a right side view of the sound and video collecting unit (Form 2). (A) is a top view of the upper
side insulation part which comprises a microphone insulation part, (b) is sectional drawing of an
upper side insulation part (form 2). (A) is a top view of the lower insulating component which
comprises a microphone insulating component, (b) is sectional drawing of a lower insulating
component (form 2). The top view of the fixing device main body (form 3). The top view of the
fixing device main body (form 4). The figure which shows the installation position in the vehicle
of a sound and an imaging ¦ video extraction unit, and a sound source position estimation
apparatus (form 1 thru ¦ or form 4). The figure which shows the positional relationship of a
microphone (conventional).
[0008]
As shown in FIGS. 1 (b) and 1 (c), the fixed device 1 of the present embodiment estimates a sound
source using sound data collected by a plurality of microphones and video data photographed by
a camera. Is a device for fixing the five microphones 2 and one camera 3 used in the above in a
predetermined relative position. A sound and video sampling unit in which five microphones 2
and one camera 3 are fixed at a predetermined relative position by fixing the five microphones 2
and one camera 3 to the fixing device 1 in a fixed state. 99 are configured. As shown in FIG. 8 (b),
the sound and video collecting unit 100 includes a sound and video collecting unit 99 and a table
device 4. The table unit 4 mounts the sound and image pickup unit 99 so as to be vertically
movable, and has a rotation center axis a1 parallel to the center axis a2 of the microphone 2
fixed to the fixing unit 1 with the sound and image pickup unit 99 fixed. Mount as rotatable. That
is, in the sound and image collecting unit 100, the sound and image collecting unit 99 in which
the five microphones 2 and one camera 3 are fixedly attached to the fixing device 1 is mounted
on the table device 4 and can be rotated It is the composition which became able to move up and
down.
[0009]
As shown in FIG. 7A, the fixing device 1 includes a base 6, a support frame 7, a microphone pair
fixing portion 8 as a first microphone fixing portion, and a fifth microphone fixing as a second
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microphone fixing portion. And a microphone fixing part 10 and a microphone fixing part 11. A
fixing device main body 5 is formed by the base 6, the support frame 7, the microphone pair
fixing portion 8 and the fifth microphone fixing portion 9.
[0010]
The base 6, the support frame 7, the microphone fixing part 11, and the shaft 38 of the
microphone 2 are made of metal such as stainless steel, for example, and the microphone
insulating part 10 is made of an insulating material.
[0011]
As shown to Fig.5 (a), the base 6 is formed in the flat plate of a right-angled isosceles triangle, for
example.
The lower ends of the three columns 14 (14a, 14b) of the support frame 7 are connected to the
apexes of the base triangle by connection means such as welding or bonding. The triangular
apexes of the base 6 and the lower ends of the three columns 14 of the support frame 7 are
configured to be in concavo-convex engagement, and the apexes of the triangles of the base 6
and the lower ends of the three columns 14 of the support frame 7 It is connected by connection
means such as welding or adhesion in a state of being engaged in a concavo-convex engagement.
[0012]
The support frame 7 includes a front frame 7a and a rear frame 7b. The front frame 7 a includes
a camera fixing frame 17, left and right beams 18, and a fixing portion supporting frame 19. The
camera fixing frame 17 is connected to two apexes other than the apexes of the right-angled
isosceles triangle of the base 6 and extends in the vertical direction with respect to the flat plate
surface 22 of the base 6; And a camera attachment portion 20 provided to extend rearward from
the upper and lower center position of the camera. The camera attachment portion 20 is formed
of a flat plate having a plane orthogonal to the sides other than the isosceles triangle of the right
isosceles triangle of the base 6, and includes a through hole 21 through which a screw for
screwing the camera is inserted. The fixing portion support frame 19 extends obliquely upward
in a direction approaching each other from the upper ends of the front left and right lower
columns 14a, and then extends perpendicularly to the flat plate surface 22 of the base 6. Left
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and right beams 18 extending in the left and right direction connect the upper end positions of
the lower support posts 14a on the front left and right. The left and right beams 18 function as
reinforcing portions that increase the strength of the support frame 7. The rear side frame 7 b
includes a fixing portion support frame 19 a and front and rear beams 23 extending in the front
and rear direction. The fixed portion support frame 19a is formed by a rear support post 14b
whose lower end is connected to a right angle apex of a right-angled isosceles triangle of the
base and extends in a front diagonally upward direction. The front and rear beams 23 project
from the central portion of the rear support 14 b to connect the rear support 14 b and the left
and right beams 18. The front end of the front and rear beams 23 and the central portion of the
left and right beams 18 are engaged in concavo-convex engagement, and the front end of the
front and rear beams 23 and the central part of the left and right beams 18 are engaged in
concavo-convex engagement Connected by means.
[0013]
As shown in FIG. 5A, the microphone pair fixing portion 8 is provided with fixing holes 31 at four
corners of a flat square frame. The centers of the four fixed holes 31 are formed to coincide with
the vertices of the square, respectively. As shown in FIGS. 5B and 6A, the inner side surface 32 of
the square frame 30 connecting the four fixing holes 31 and the upper portions of the three
fixing portion supporting frames 19 and 19a on the right and left and the rear. Is configured to
be engaged in a concavo-convex engagement, and is connected by connection means such as
welding or adhesion in a state where the inner side surface 32 of the square frame 30 and the
upper portions of the three fixed part support frames 19 and 19a are engaged in concavo-convex
engagement .
[0014]
As shown in FIG. 6A, the fifth microphone fixing portion 9 is formed in a flat ring shape having a
fixing hole 31. The portions of the fifth microphone fixing portion 9 connected to the upper ends
of the three fixing portion support frames 19 and 19a by welding, adhesion, and the like in the
outer peripheral portion of the ring of the fifth microphone fixing portion 9 include the upper
ends of the three fixing portion support frames 19 and 19a A recess 35 is formed to engage with
the recess and protrusion. The concave portions 35 of the fifth microphone fixing portion 9 and
the upper ends of the three fixing portion support frames 19 and 19a are connected by
connection means such as welding or bonding in a state in which they are engaged with each
other.
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[0015]
Thus, the fixing device main body 5 as shown in FIG. 6 (b) and FIG. 1 (a) is formed.
[0016]
Then, as shown in FIG. 7A, the microphone 2 is fixed to the fixing hole 31 by using the
microphone insulating component 10 and the microphone fixing component 11 which constitute
the fixing device 1.
The microphone insulating component 10 is composed of an upper insulating component 10a
and a lower insulating component 10b.
[0017]
As shown in FIG. 2, the upper insulating component 10 a is formed in a flat ring shape provided
with a through hole 39 of a size into which the shaft 38 of the microphone 2 penetrates and is
fitted. The upper insulating component 10 a is configured to include a small diameter portion 41
having a small outer diameter and a large diameter portion 42 having an outer diameter larger
than the outer diameter of the small diameter 41. A ring surface connecting the upper end of the
outer periphery of the small diameter portion 41 and the lower end of the outer periphery of the
large diameter portion 42 forms a weir surface 43 for dropout prevention. As shown in FIG. 7A,
the inner peripheral surface of the through hole 39 of the upper insulating component 10a and
the microphone 2 with the shaft 38 of the microphone 2 fitted so as to penetrate the through
hole 39 of the upper insulating component 10a. The outer peripheral surface of the shaft portion
38 is bonded by an adhesive. In this case, the large diameter portion 42 is positioned closer to
the sound collecting portion 45 of the microphone 2. As a result, when the microphone 2 is
inserted into the fixing hole 31 from the lower end side of the shaft portion 38 of the
microphone 2 from above the fixing hole 31, the small diameter portion 41 is positioned inside
the fixing hole 31. The inner circumferential surface and the shaft portion 38 of the microphone
2 are insulated. In addition, since the wedge surface 43 corresponding to the lower surface of the
large diameter portion 42 and the upper surface 46 of the fixing portion around the fixing hole
31 are in contact (see FIGS. 1 (b), (c) and 7 (b)) The upper surface 46 and the shaft portion 38 of
the microphone 2 are insulated, and the locking between the wedge surface 43 and the upper
surface 46 of the fixed portion prevents the microphone 2 from falling downward.
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[0018]
As shown in FIG. 3, the lower insulating component 10 b is formed in a flat ring shape provided
with a through hole 48 of such a size that the shaft 38 of the microphone 2 penetrates and fits.
The outer peripheral diameter of the ring of the lower insulating component 10 b is formed
larger than the diameter of the fixing hole 31. The lower insulating component 10 b is not
bonded to the shaft 38 of the microphone 2.
[0019]
As shown in FIG. 4, the microphone fixing part 11 is formed by a known retaining ring called a
snap ring, for example.
[0020]
Therefore, as shown in FIGS. 7A and 7B, the microphone 2 is inserted into the fixing hole 31
from the lower end side of the shaft portion 38 of the microphone 2 with the upper insulating
component 10a adhered to the shaft portion 38. The lower insulating component 10 b is inserted
from the lower end side of the shaft 38 of the microphone 2 in a state where the portion 41
penetrates the fixing hole 31 and is in contact with the hook surface 43 and the fixing portion
upper surface 46 around the fixing hole 31. The ring upper surface 49 of the lower insulating
component 10b and the fixed portion lower surface 51 around the fixing hole 31 are brought
into contact with each other, and in that state, the ring lower surface 52 of the lower insulating
component 10b and the upper surface 56 of the microphone fixed component 11 The
engagement hole 54 of the microphone fixing part 11 is engaged with the shaft 38 while making
[0021]
According to the above, since the axial part 38 and the fixed parts 8 and 9 of each microphone 2
are insulated by the microphone insulating component 10, it is possible to prevent the mixing of
the electrical noise in the input signal of the microphone 2.
In addition, the upper insulating component 10 a bonded to the shaft 38 of the microphone 2
engages with the upper surface 46 of the fixing portion around the fixing hole 31 to prevent the
microphone 2 from falling downward.
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Further, since the microphone fixing part 11 is fixedly attached to the shaft 38 of the
microphone 2, the microphone fixing part 11 is locked to the ring lower surface 52 of the lower
insulating part 10 b, so that the microphone 2 is moved upward. Dropout is prevented. Further,
since the lower insulating component 10b and the shaft portion 38 of the microphone 2 are not
adhered to each other, when the microphone 2 breaks down, the microphone fixing component
11 and the lower insulating component 10b are removed to facilitate the microphone 2 It
becomes exchangeable.
[0022]
As shown in FIG. 8A, the microphones 2 are fixed to the four fixing holes 31 of the microphone
pair fixing unit 8, and the microphones 2 are also fixed to the fixing holes 31 of the fifth
microphone fixing unit 9.
[0023]
As described above, in the microphone pair fixing unit 8, the centers of the sound collecting units
45 of one pair of two microphones 2 and 2 are positioned on the first straight line X (see FIG. 15)
at predetermined intervals. And a second straight line Y in which the center of the sound
collection unit 45 of the other pair of two microphones 2 and 2 is orthogonal to the first straight
line X. The other two microphones 2 and 2 are fixed so as to be positioned at predetermined
intervals on the top (see FIG. 15), and the fifth microphone fixing unit 9 is the center of the
sound collecting unit of one microphone By fixing one microphone 2 so that it is located at a
position distant from a square plane connecting the centers of the sound collecting units 45 of
the four microphones 2, each of the vertex positions of the square pyramid is Five micro Center
of the sound collecting portion 45 of the O emissions 2 are positioned.
[0024]
Then, the camera 3 is installed on the base 6, the screw 55 is penetrated through the through
hole 21 formed in the camera attachment portion 20, and the screw 55 is fastened to the screw
hole 57 provided on the side of the camera 3 The camera 3 is fixed to the camera mounting
portion 20 with a screw 55 in a fixed state.
[0025]
Thus, the sound and video sampling unit 99 is formed.
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As shown in FIGS. 1 (b), (c) and 8 (b), the sound and image collecting unit 99 according to this
embodiment has a size of 40 mm in the left-right direction a (the width of the support frame is
37 mm), The dimension in the direction b is 60 mm (the width of the support frame is 20 mm),
and the dimension in the height direction c is 85 mm.
Also, according to the sound and video sampling unit 99, the difference between the center of
sound (a point equidistant from each microphone) and the center of video (the center position of
the lens of the camera) 22 mm in the height direction and 42 mm in the height direction c.
Therefore, the error between the estimated sound source position and the captured image can be
reduced.
[0026]
The table device 4 includes a tripod 60, a vertical telescopic mechanism 61, and a rotating table
62. The up and down extension mechanism 61 includes an extension rod 63 and an adjustment
mechanism 64 that determines the extension amount of the extension rod 63. The adjusting
mechanism 64 is formed by a through screw hole 66 provided in the guide cylinder 65 of the
telescopic rod 63, and an adjusting screw 67 screwed into the through screw hole 66 to move
back and forth. The tip end of the screw 67 is pressed against the outer periphery of the
telescopic rod 63 to restrict the vertical movement of the telescopic rod 63, whereby the height
position of the rotating table 62 rotatably provided at the upper end of the telescopic rod 63 is
determined. The rotary table 62 is formed in a disk shape, and a knurl 69 is formed on the outer
peripheral surface 68 of the circle. A connecting rod 63a is provided from the center of the
upper surface of the rotating table 62, and the connecting rod 63a is fitted into the rotation
center hole 90 provided in the base 6 to fix the connecting rod 63a and the base 6 to each other.
The sound and video collecting unit 99 and the table device 4 are connected to complete the
sound and video collecting unit 100. By placing the hand on the knurling 69 and rotating the
turntable 62, the sound and image collecting unit 99 is also rotated together with the turntable
62 with the center of the circle of the turntable 62 as the rotation center.
[0027]
The sound and image collecting unit 100 is installed in the interior 111 of the car 110 as shown
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in FIG. 14 and the sound collected by the five microphones 2 and the image picked up by the
camera 3 are sound source position estimation devices 101. Output to The sound source position
estimation device 101 displays a sound source direction estimation image on the image display
means 102 as an output means based on the input sound and video. Therefore, the generation
source of the abnormal noise generated in the interior 111 of the car 110 can be estimated.
[0028]
According to the fixing device 1 of mode 1, the positional relationship between the five
microphones 2 can be accurately maintained, and since the five microphones 2 and one camera
3 can be fixed together, the accuracy of the sound source position estimation can be improved. It
can improve. In addition, since the difference between the sound center and the image center is
reduced, the error between the estimated sound source position and the captured image is
reduced. That is, since the five microphones and the camera are integrally fixed in a
predetermined positional relationship, the fixing device can be made compact and excellent in
portability while improving the accuracy of the sound source position estimation.
[0029]
As shown in FIG. 9, the microphone pair fixing portion 8 and the fifth microphone fixing portion
9 penetrate through the fixing hole 31, the inner peripheral surface 73 of the fixing hole 31 and
the outer peripheral surface 74 of the fixing portions 8 and 9. The upper insulating component
10a and the lower insulating component 10b are provided with notches 75, and the notches 76
and 77 corresponding to the notches 75 of the fixing portions 8 and 9 are also provided on the
upper insulating component 10a and the lower insulating component 10b. The width g of the
notches 75, 76, and 77 is formed so as to pass through a wire cable (not shown) connecting the
microphone 2 and the sound source position estimation device 101. The other structure is the
same as in the first embodiment. According to the second embodiment, the wire cable is passed
through the cuts 75, 76, 77 in the fixing hole 31 while the wire cable (not shown) connecting the
microphone 2 and the sound source position estimation device 101 is connected to the
microphone 2. Since the microphone 2 can be inserted into the fixing hole 31 after it is inserted,
and there is no need to remove the electric wire cable from the microphone 2 one by one at the
time of fixing the microphone 2, the complexity at the time of fixing the microphone 2 can be
eliminated.
[0030]
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Embodiment 3 As shown in FIG. 12, the fixing hole 31 of the microphone pair fixing portion 8
and the fifth microphone fixing portion 9 is provided with an opening 81 as a cut enabling the
axial portion 38 of the microphone 2 to be inserted from the side. . The width dimension W of
the opening 81 is formed such that the shaft 38 of the microphone 2 can be inserted into the
fixing hole 31. The other structure is the same as in the first embodiment. According to the third
aspect, since the shaft portion 38 of the microphone 2 can be inserted into the fixing hole 31
through the opening 81, the fixing operation of the microphone 2 becomes easier, and the
complexity in the fixing operation of the microphone 2 can be eliminated. .
[0031]
Embodiment 4 As shown in FIG. 13, the microphone pair fixing portion 8 and the fifth
microphone fixing portion 9 are formed of an insulating material 85 such as acrylic resin.
Further, as in the third embodiment, the fixing hole 31 of the microphone pair fixing portion 8
and the fifth microphone fixing portion 9 is provided with the opening 86 which allows the axial
portion 38 of the microphone 2 to be inserted from the side. The width dimension W1 of the
opening 86 is formed such that the shaft 38 of the microphone 2 can be inserted into the fixing
hole 31. In the fourth embodiment, the microphone pair fixing portion 8 and the fifth
microphone fixing portion 9 are formed of resin. So it is more flexible than metal. Therefore, the
width dimension of the opening 86 may be smaller than the width dimension W of the opening
81 of the third embodiment. Since the width dimension W1 of the opening 86 can be reduced,
after the microphone 2 is fixed to the fixing hole 31, the microphone 2 does not easily tilt to the
opening 86 side, and it becomes difficult to separate from the fixing hole 31. According to the
fourth aspect, the microphone insulating part 10 of the first aspect is not necessary, and noise
mixing into the microphone 2 can be prevented by the microphone pair fixing portion 8 and the
fifth microphone fixing portion 9 themselves. It is advantageous in terms of Further, as in the
third embodiment, since the shaft portion 38 of the microphone 2 can be inserted into the fixing
hole 31 through the opening 86, the fixing operation of the microphone 2 is further simplified,
and the complication in the fixing operation of the microphone 2 is reduced. It can be eliminated.
The other configuration is the same as in the first embodiment.
[0032]
In the third and fourth embodiments, after the microphone 2 is fixed to the fixing hole 31, the
microphone 2 may be inclined to the opening 81, 86 side. It is preferable to attach an antiinclination material of
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[0033]
The sound and image collecting unit 100 using the fixing device 1 of the present invention can
be used not only in the interior 111 of the car 110 but also in any place.
[0034]
Reference Signs List 1 fixing device 2 microphone 3 camera 7 support frame 8 microphone pair
fixing portion (first microphone fixing portion) 9 fifth microphone fixing portion (second
microphone fixing portion) 10 microphone insulating component 10 a upper side Insulating
parts, 10b lower insulating parts, 11 microphone fixing parts, 31 fixing holes, 38 shafts, 41 small
diameter parts, 43 ridges, 45 sound collecting parts, 75 cuts, 81, 86 openings (cuts), 85
insulating material.
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