JP2020102780A - Microphone array - Google Patents

Abstract

To provide a microphone array capable of easily changing arrangement of multiple microphones.SOLUTION: A microphone array 1 includes: multiple microphones 10; a frame body 20; and multiple microphone holders 30 arranged in the frame body 20 so as to respectively hold each one of the microphones 10. The frame body 20 includes: multiple bar-shape first frame members 21; multiple bar-shape second frame members 22; and multiple connection members 23. The multiple first frame members 21 and the multiple second frame members 22 are crossed at multiple cross-over parts. The one connection member 23 rotatably connects the one first frame member 21 to the one second frame member 22 at the one cross-over part. Each one of the microphone holders 30 is fixed to the one connection member 23.SELECTED DRAWING: Figure 1

Description

The present invention relates to a microphone array including a plurality of microphones.

The microphone array is capable of simultaneously measuring the sound generated from the subject at a plurality of different places, and is used in a device for measuring the sound generated from a product. The following Patent Document 1 describes an acoustic measurement device using two microphone arrays.

JP, 2006-214740, A

As shown in Patent Document 1, in a conventional microphone array, a plurality of microphones are fixed on a frame configured by combining rod-shaped members.

On the other hand, when sound is measured using a plurality of microphones, it is usually necessary to work to determine the arrangement of the microphones. For example, when measuring the sound generated from the subject, it is necessary to narrow down the optimum arrangement while changing the arrangement of the microphones according to the range of the space to be measured and the frequency of the sound.

However, in the conventional microphone array in which the microphones are fixed on the frame, it is not easy to change the arrangement of the microphones. To change the microphone placement, the microphones must be removed from the frame and refastened in another location, which must be done for multiple microphones. Moreover, in order to determine an appropriate microphone arrangement, the arrangement change described above needs to be repeated for a plurality of microphones. Therefore, the conventional microphone array has a problem that the time and labor required for the measurement work are very large.

The present invention has been made in view of such circumstances, and an object thereof is to provide a microphone array in which the arrangement of a plurality of microphones can be easily changed.

A microphone array according to one embodiment of the present invention includes a plurality of microphones for detecting sound generated in a subject, a frame body arranged to face the subject, and one microphone provided in the frame body. And a plurality of microphone holders for holding. The frame body includes a plurality of rod-shaped first frame members, a plurality of rod-shaped second frame members, and a plurality of connecting members that connect the plurality of first frame members and the plurality of second frame members. The plurality of first frame members are arranged parallel to each other along a first virtual plane, and the plurality of second frame members are arranged parallel to each other along a second virtual plane parallel to the first virtual plane. ing. The plurality of first frame members and the plurality of second frame members intersect at a plurality of intersecting portions when viewed from a normal direction perpendicular to the first virtual plane and the second virtual plane. One connecting member connects one first frame member and one second frame member at one intersection so as to be rotatable about an axis parallel to the normal direction. Each of the plurality of microphone holders is fixed to one connecting member.
According to this configuration, by the operation of changing the intersection angle between the first frame member and the second frame member viewed from the normal direction, the relative arrangement of the plurality of connecting members viewed from the normal direction is changed, Along with this, the relative arrangement of the plurality of microphone holders viewed from the normal direction changes. Therefore, it is possible to change the relative arrangement of the plurality of microphones when viewed from the normal direction by a simple operation of changing the intersection angle between the first frame member and the second frame member.

The microphone may have a sound hole for introducing the sound to be detected. The microphone holder may hold the microphone such that the shaft of the connecting member fixed to the microphone holder and the sound hole overlap each other.
According to this structure, the connecting member connecting the first frame member and the second frame member rotates irregularly in accordance with the operation of changing the intersection angle between the first frame member and the second frame member. However, since the axis of the connecting member and the sound hole overlap, the relative arrangement of the sound holes of the plurality of microphones viewed from the normal direction is the same as that of the plurality of connecting members viewed from the normal direction. Almost match. Therefore, the relative arrangement of the sound holes of the plurality of microphones when viewed from the normal direction is less likely to be affected by the rotation of each connecting member (each microphone holder), and the crossing angle between the first frame member and the second frame member is reduced. It becomes easy to be determined by

The microphone array includes a plurality of rod-shaped members arranged parallel to each other along a third virtual plane parallel to the first virtual plane and the second virtual plane, and a plurality of engaging portions that engage with each one of the rod-shaped members. May have and. The plurality of engaging portions may be fixed to one different connecting member. One rod-shaped member overlaps with two or more intersecting portions when viewed from the normal direction, and engages with two or more engaging portions fixed to two or more connecting members located at the two or more intersecting portions. You can The one engaging portion that engages with one rod-shaped member is allowed to move in a direction parallel to the longitudinal direction of the one rod-shaped member, and its relative rotation with respect to the one rod-shaped member is restricted. Good.
According to this configuration, when the relative arrangement of the plurality of microphones is changed by the operation of changing the intersecting angle between the first frame member and the second frame member, two or more engaging members that engage with each rod-shaped member. The joining portion moves parallel to each rod-shaped member, but does not rotate relative to each rod-shaped member. Accordingly, even when the relative arrangement of the plurality of microphones is changed by the operation of changing the intersecting angle between the first frame member and the second frame member, the relative rotation of each microphone with respect to each rod-shaped member is suppressed. ..

The longitudinal direction of the rod-shaped member may be parallel to the bisector of the angle formed by the first frame member and the second frame member when viewed from the normal direction.
According to this configuration, when the posture of the frame body is maintained such that the bisectors are oriented in a certain direction with respect to the subject, the operation of changing the intersection angle between the first frame member and the second frame member. Even if the relative arrangement of the plurality of microphones is changed by, the respective microphones do not rotate relative to the subject.

The engagement portion may include a through hole into which the rod-shaped member is inserted along the longitudinal direction.
According to this structure, the engaging portion can move along the longitudinal direction of the rod-shaped member.

The engaging portion may be formed integrally with the microphone holder, or may be fixed to the microphone holder via a connecting member that penetrates the first frame member and the second frame member.
By forming the engaging portion integrally with the microphone holder, the number of parts is reduced and the configuration is simplified. Since the engaging portion is fixed to the microphone holder via the connecting member, the microphone can be easily arranged in the vicinity of the connecting member, and thus the positional displacement of the microphone due to rattling of the connecting member can be easily suppressed.

The microphone may be connected to a cable for transmitting a sound detection signal. The microphone array may include at least one cable clamp that fixes a cable of one microphone to a microphone holder of the one microphone. The cable clamp may fix the cable to the microphone holder via a connecting member penetrating the first frame member and the second frame member.
According to this configuration, since the cable extends from the side where the microphone is located to the opposite side, it becomes easier to route the cable away from the subject, and the influence of the cable on the sound measurement is reduced, and the first frame The cable is less likely to get in the way in the operation of changing the intersection angle between the member and the second frame member. Further, since the cable extends between the first frame member and the second frame member, the rotation of the microphone is easily suppressed.

The microphone may be connected to a cable for transmitting a sound detection signal. The microphone array may include at least one cable guide portion that guides the cable in a direction parallel to the bisector of the angle formed by the first frame member and the second frame member when viewed from the normal direction. .. The cable guide may be fixed to one connecting member, and is held by a microphone holder fixed to another connecting member adjacent to the one connecting member in a direction parallel to the bisector. You may guide the microphone cable.
According to this configuration, the cable of each microphone is guided in the direction parallel to the bisector of the angle formed by the first frame member and the second frame member, so that the first frame member and the second frame member are guided. Even if an operation of changing the intersection angle with the member is performed, the posture of the microphone is easily maintained so that the cable is substantially parallel to the bisector. Therefore, the rotation of each microphone due to the operation of changing the intersection angle between the first frame member 21 and the second frame member 22 is easily suppressed.

According to the present invention, it is possible to provide a microphone array in which the arrangement of a plurality of microphones can be easily changed.

FIG. 1 is a front view showing an example of the microphone array according to the first embodiment, showing a state in which the intervals between the microphones are widened. FIG. 2 is a front view showing an example of the microphone array according to the first embodiment, and shows a state in which the intervals between the microphones are narrowed. FIG. 3 is an enlarged perspective view of the vicinity of the intersection of the first frame member and the second frame member in the microphone array according to the first embodiment. FIG. 4 is an enlarged side view of the vicinity of the intersection of the first frame member and the second frame member in the microphone array according to the first embodiment. FIG. 5 is a diagram showing a modification of the microphone array according to the first embodiment. FIG. 6 is a diagram showing another modification of the microphone array according to the first embodiment. FIG. 7 is a front view showing an example of the microphone array according to the second embodiment, showing a state in which the intervals between the microphones are widened. FIG. 8 is a front view showing an example of the microphone array according to the second embodiment, and shows a state in which the intervals between the microphones are narrowed. FIG. 9 is an enlarged perspective view of the vicinity of the intersection between the first frame member and the second frame member in the microphone array according to the second embodiment. FIG. 10 is an enlarged side view of the vicinity of the intersection of the first frame member and the second frame member in the microphone array according to the second embodiment. FIG. 11 is a diagram showing a modification of the microphone array according to the second embodiment.

<First Embodiment>
1 and 2 are diagrams showing an example of the microphone array 1 according to the first embodiment. The microphone array 1 shown in FIGS. 1 and 2 is provided in a plurality of microphones 10 for detecting a sound generated in a subject, a frame body 20 facing the subject, and a frame body 20. It has a plurality of microphone holders 30. Each of the plurality of microphone holders 30 holds one microphone 10. The frame body 20 includes a plurality of rod-shaped first frame members 21 and a plurality of rod-shaped second frame members 22.

In this specification, three directions (X, Y, Z) perpendicular to each other are defined in order to describe the relative positional relationship of each element shown in the drawings. The X direction includes two directions (X1 and X2) that are opposite to each other, the Y direction includes two directions (Y1 and Y2) that are opposite to each other, and the Z direction is two directions (Z1 and Z2) that are opposite to each other. )including. These directions are given only for convenience of description, and do not limit the usage mode of the microphone array 1.

As shown in FIGS. 1 and 2, in the microphone array 1 according to the present embodiment, the arrangement of the plurality of microphone holders 30 provided on the frame body 20 can be changed. FIG. 1 shows a state in which the X-direction distance between the microphones 10 is widened, and FIG. 2 shows a state in which the X-direction distance between the microphones 10 is narrowed. The subject whose sound is to be measured is located on the Y2 side of the frame 20.

FIGS. 3 and 4 are enlarged views of the vicinity of the intersection between the first frame member 21 and the second frame member 22 in the microphone array 1 shown in FIGS. 1 and 2. FIG. 3 is a perspective view of the intersection viewed from the Y2 side, and FIG. 4 is a side view of the intersection viewed from the X2 side. As shown in FIG. 4, the microphone array 1 has a plurality of connecting members 23 that connect the plurality of first frame members 21 and the plurality of second frame members 22.

As shown in FIGS. 3 and 4, the plurality of first frame members 21 are arranged along a first virtual plane P1 that is parallel to the XZ plane, and as shown in FIGS. They are lined up in parallel. In the example of FIGS. 1 and 2, the arrangement intervals of the first frame members 21 are equal. The frame body 20 includes two first frame members 21 having substantially the same length, and one or more first frame members 21 longer than the two first frame members 21 (examples of FIGS. 1 and 2 ). And four relatively long first frame members 21), one or more relatively long first frame members 21 are located between two relatively short first frame members 21.

As shown in FIG. 4, the plurality of second frame members 22 are arranged along a second virtual plane P2 that is parallel to the first virtual plane P1, and are parallel to each other as shown in FIGS. 1 and 2. Lined up. In the example of FIGS. 1 and 2, the arrangement intervals of the second frame members 22 are uniform. The frame body 20 includes two second frame members 22 having substantially the same length and one or more second frame members 22 longer than the two second frame members 22 (examples of FIGS. 1 and 2 ). 4 second frame members 22), one or more first frame members 21 which are relatively long are located between two second frame members 22 which are relatively short.

In the example of FIGS. 1 and 2, both end portions of the plurality of first frame members 21 and both end portions of the plurality of second frame members 22 are located on substantially common rectangular sides. When the intersecting angle between the first frame member 21 and the second frame member 22 changes, the size of this rectangle changes.

As shown in FIGS. 1 and 2, the plurality of first frame members 21 and the plurality of second frame members 22 are viewed from the normal direction (Y direction) perpendicular to the first virtual plane P1 and the second virtual plane P2. And intersect at multiple intersections. As shown in FIG. 3, one connecting member 23 has the one first frame member 21 and the one first frame member 21 at one intersection portion where one first frame member 21 and one second frame member 22 intersect. The two second frame members 22 are rotatably connected about an axis AX parallel to the normal direction (Y direction).

Each of the plurality of microphone holders 30 is fixed to one connecting member 23. In the example of FIGS. 3 and 4, a bolt-shaped connecting member 23 extending in the Y direction is provided on the Y1 side surface of the microphone holder 30. The connecting member 23 penetrates through holes formed in the first frame member 21 and the second frame member 22, respectively. A nut 24 is attached to the end of the connecting member 23 on the Y1 side.

The microphone 10 has a sound hole 11 for introducing a sound to be detected, as shown in FIG. The microphone holder 30 holds the microphone 10 such that the axis AX of the connecting member 23 fixed to the microphone holder 30 and the sound hole 11 overlap each other.

In the example of FIG. 3, the microphone 10 has an end surface 12 having a sound hole 11 formed therein. In the microphone holder 30, the end surface 12 is located on the Y2 side where the subject is located, the end surface 12 is substantially perpendicular to the axis AX, and the sound hole 11 formed in the end surface 12 is located at a position overlapping the axis AX. Hold the microphone 10 in place.

The microphone 10 shown in FIG. 3 has an overall rectangular parallelepiped shape and is connected to a cable 15 for transmitting a sound detection signal. The microphone holder 30 has two grips 31 that hold the portion of the microphone 10 on the Z2 side from both sides in the X direction. The cable 15 is pulled out to the Z2 side from the gap between the two grips 31.

Further, the microphone holder 30 shown in FIG. 3 has a contact surface 32 that comes into contact with a surface (Y1 side surface) opposite to the end surface 12 of the microphone 10. The microphone 10 is fixed to the contact surface 32 with, for example, a double-sided adhesive tape.

As described above, in the microphone array 1 according to this embodiment, the plurality of first frame members 21 arranged in parallel with each other along the first virtual plane P1 and the second virtual planes parallel to the first virtual plane P1. The plurality of second frame members 22 arranged in parallel to each other along the plane P2 are a plurality of intersecting portions when viewed from the normal direction (Y direction) perpendicular to the first virtual plane P1 and the second virtual plane P2. Intersect at. Then, one connecting member 23 is capable of rotating one first frame member 21 and one second frame member 22 around an axis AX parallel to the normal direction (Y direction) at one intersection. It is connected. Further, each of the plurality of microphone holders 30 is fixed to one different connecting member 23.
According to such a configuration, by operating to change the intersection angle between the first frame member 21 and the second frame member 22 viewed from the normal direction (Y direction), a plurality of objects viewed from the normal direction (Y direction) can be obtained. The relative disposition of the connecting member 23 changes, and the relative disposition of the plurality of microphones 10 viewed from the normal direction (Y direction) changes accordingly (FIGS. 1 and 2 ). Therefore, the relative arrangement of the plurality of microphones 10 viewed from the normal direction (Y direction) can be changed by a simple operation of changing the intersection angle between the first frame member 21 and the second frame member 22. This greatly simplifies the work for determining the appropriate placement of the microphone 10 in sound measurement, and can significantly reduce the time and labor required for the measurement work.

In the microphone array 1 according to the present embodiment, the microphone holder 30 holds the microphone 10 so that the axis AX of the connecting member 23 and the sound hole 11 of the microphone 10 overlap each other. As a result, the connection member 23 that connects the first frame member 21 and the second frame member 22 is irregular with the operation of changing the intersecting angle between the first frame member 21 and the second frame member 22. Even when rotated, since the axis AX of the connecting member 23 and the sound hole 11 overlap, the relative arrangement of the sound holes 11 of the plurality of microphones 10 viewed from the normal direction (Y direction) is the normal direction ( This is almost the same as the relative arrangement of the plurality of connecting members 23 when viewed from the Y direction). Therefore, the relative arrangement of the sound holes 11 of the plurality of microphones 10 as viewed from the normal direction (Y direction) is less likely to be affected by the irregular rotation of each connecting member 23 (each microphone holder 30), and The angle of intersection between the frame member 21 and the second frame member 22 facilitates stable determination.

Next, a modified example of the microphone array 1 according to the present embodiment will be described.

(Modification 1)
FIG. 5 is a diagram showing a modified example of the microphone array 1 according to the first embodiment, and is a side view in which the vicinity of the intersection between the first frame member 21 and the second frame member 22 is enlarged. The microphone array 1 according to this modification includes a cable clamp 60 that fixes the cable 15 of one microphone 10 to the microphone holder 30 of the one microphone 10. The cable clamp 60 fixes the cable 15 to the microphone holder 30 via the connecting member 23 penetrating the first frame member 21 and the second frame member 22. The microphone array 1 has, for example, one cable clamp 60 for each microphone holder 30.

In the example of FIG. 5, the cable clamp 60 has a through hole of the connecting member 23 and is sandwiched between the first frame member 21, the second frame member 22 and the nut 24. The cable 15 of the microphone 10 extends from the Y2 side of the frame body 20 to the Y1 side of the frame body 20 through the space between the first frame member 21 and the second frame member 22, and the cable 15 on the Y1 side of the frame body 20. It is clamped by the clamp 60.

According to this modification, since the cable 15 extends from the side where the microphone 10 is located (Y2 side) to the opposite side (Y1 side), it becomes easy to route the cable 15 away from the subject. Therefore, the influence of the cable 15 on the sound measurement can be reduced, and the cable 15 is less likely to be an obstacle in the operation of changing the intersecting angle between the first frame member 21 and the second frame member 22. Further, since the cable 15 extends between the first frame member 21 and the second frame member 22, the rotation range of the microphone 10 is limited, so that the first frame member 21 and the second frame member 22 are separated from each other. The rotation of the microphone 10 due to the operation of changing the intersection angle can be suppressed.

(Modification 2)
FIG. 6 is a diagram showing another modification of the microphone array 1 according to the first embodiment, and is an enlarged side view of the vicinity of the intersection between the first frame member 21 and the second frame member 22. The microphone array 1 according to this modification is parallel to the bisector of the angle formed by the first frame member 21 and the first frame member 21 when viewed from the normal direction (Y direction) (see FIG. 6). It has a cable guide portion 70 that guides the cable 15 in the Z direction). One cable guide portion 70 (Z2 side cable guide portion 70 in FIG. 6) is fixed to one connecting member 23 (Z2 side connecting member 23 in FIG. 6), and with respect to the one connecting member 23. Of the microphone 10 held by the microphone holder 30 that is fixed to another one connecting member 23 (Z1 side connecting member 23 in FIG. 6) adjacent in the direction parallel to the above bisector (Z direction). Guide the cable 15.

In the example of FIG. 6, the cable guide portion 70 has a through hole for the connecting member 23 and is sandwiched between the first frame member 21, the second frame member 22 and the nut 24. The cable 15 of the microphone 10 extends from the Y2 side of the frame body 20 to the Y1 side of the frame body 20 through the space between the first frame member 21 and the second frame member 22, and the cable 15 on the Y1 side of the frame body 20. It is guided by the guide unit 70.

According to this modified example, the cable 15 of each microphone 10 is guided in a direction parallel to the bisector of the angle formed by the first frame member 21 and the second frame member 22, and thus the first frame. Even when an operation of changing the intersecting angle between the member 21 and the second frame member 22 is performed, the posture of the microphone 10 is easily maintained so that the cable 15 is substantially parallel to the bisector. Therefore, it is possible to effectively suppress the rotation of each microphone 10 (the relative rotation with respect to the above-described bisector) due to the operation of changing the intersection angle between the first frame member 21 and the second frame member 22.

<Second Embodiment>
Next, a second embodiment of the present invention will be described. 7 and 8 are diagrams showing an example of the microphone array 1 according to the second embodiment. FIG. 7 shows a state in which the distance between the microphones 10 in the X direction is widened, and FIG. 9 and 10 are enlarged views of the vicinity of the intersection of the first frame member 21 and the second frame member 22 in the microphone array 1 shown in FIGS. 7 and 8. FIG. 9 shows a perspective view of the intersection seen from the Y2 side obliquely, and FIG. 10 shows a side view of the intersection seen from the X2 side.

The microphone array 1 according to the second embodiment has a plurality of rod-shaped members 40 and a plurality of engaging portions 50 in addition to the same configuration as the microphone array 1 according to the above-described first embodiment. Each of the plurality of engaging portions 50 engages with one rod-shaped member 40. The plurality of engaging portions 50 are fixed to one different connecting member 23.

As shown in FIG. 10, the plurality of rod-shaped members 40 are arranged along a third virtual plane P3 parallel to the first virtual plane P1 and the second virtual plane P2, and as shown in FIGS. 7 and 8. , Are parallel to each other. In the example of FIGS. 7 and 8, the arrangement intervals of the rod-shaped members 40 are equal, and the microphone array 1 has 11 rod-shaped members 40.

One rod-shaped member 40 overlaps with two or more intersections (intersections of the first frame member 21 and the second frame member 22) when viewed from the normal direction (Y direction), and the two or more intersections are overlapped with each other. It engages with two or more engaging portions 50 fixed to the two or more connecting members 23 located. In the example of FIGS. 7 and 8, the six rod-shaped members 40 are engaged with the three engaging portions 50, and the five rod-shaped members 40 are engaged with the two engaging portions 50, respectively.

The one engaging portion 50 that engages with one rod-shaped member 40 is allowed to move in a direction parallel to the longitudinal direction of the one rod-shaped member 40, and also rotates relative to the one rod-shaped member 40. Is regulated.

As shown in FIGS. 7 and 8, the longitudinal direction of the rod-shaped member 40 is a bisector of the angle formed by the first frame member 21 and the second frame member 22 when viewed from the normal direction (Y direction). It is parallel (parallel to the Z direction). When the crossing angle of the first frame member 21 and the second frame member 22 is changed, the connecting members 23 and the microphone holders 30 fixed to the engaging portions 50 are the first frame member 21 and the second frame member. While moving in parallel to the bisector of the angle formed by (22) (moving in parallel to the Z direction), it does not rotate relative to the bisector.

In the examples of FIGS. 9 and 10, the engagement portion 50 includes a through hole 51 into which the rod-shaped member 40 is inserted along the longitudinal direction of the rod-shaped member 40, and is formed integrally with the microphone holder 30. The engaging portion 50 is provided on the Y1 side of the microphone holder 30, and the bolt-shaped connecting member 23 is provided on the surface of the engaging portion 50 on the Y1 side.

As described above, in the microphone array 1 according to the present embodiment, one rod-shaped member 40 has two or more intersecting portions (of the first frame member 21 and the second frame member 22) when viewed from the normal direction (Y direction). The crossing portion) overlaps with and engages with two or more engaging portions 50 fixed to the two or more connecting members 23 located at the two or more intersecting portions. Further, one engagement portion 50 that engages with one rod-shaped member 40 is allowed to move in a direction parallel to the longitudinal direction of the one rod-shaped member 40, and is relatively movable with respect to the one rod-shaped member 40. Rotation is restricted.
According to such a configuration, when the relative arrangement of the plurality of microphones 10 is changed by the operation of changing the intersection angle between the first frame member 21 and the second frame member 22, it is possible to engage with each rod-shaped member 40. The two or more engaging parts 50 that fit together move parallel to each rod-shaped member 40, but do not rotate relative to each rod-shaped member 40. Thereby, even when the relative arrangement of the plurality of microphones 10 is changed by the operation of changing the intersecting angle between the first frame member 21 and the second frame member 22, the relative position of each microphone 10 with respect to each rod-shaped member 40. Rotation can be suppressed. By suppressing the rotation of the microphone 10, it is possible to effectively reduce the influence of the rotation of the microphone 10 on the sound measurement result.

Further, in the microphone array 1 according to the present embodiment, the longitudinal direction of the engaging portion 50 is set parallel to the bisector of the angle formed by the first frame member 21 and the second frame member 22. ..
According to such a configuration, for example, as shown in FIGS. 7 and 8, when the posture of the frame body 20 is kept so that the above-described bisectors face a certain direction with respect to the subject, the first frame Even if the relative arrangement of the plurality of microphones 10 is changed by the operation of changing the intersection angle between the member 21 and the second frame member 22, each microphone 10 does not rotate relative to the subject. Therefore, the influence of the rotation of the microphone 10 on the sound measurement result can be reduced more effectively.

Further, according to the microphone array 1 of the present embodiment, the engaging portion 50 and the microphone holder 30 are integrally formed, so that the number of parts can be reduced and the configuration can be simplified.

Next, a modified example of the microphone array 1 according to the present embodiment will be described.

(Modification)
FIG. 11 is a diagram showing a modification of the microphone array 1 according to the second embodiment, and is a side view in which the vicinity of the intersection between the first frame member 21 and the second frame member 22 is enlarged. In the microphone array 1 according to this modification, the engaging portion 50A that engages with the rod-shaped member 40 is fixed to the microphone holder 30 via the connecting member 23A.

In the example of FIG. 11, the engagement portion 50A is located on the Y1 side of the first frame member 21 and the second frame member 22. The connecting member 23A is a bolt that penetrates through the through holes of the engaging portion 50A, the first frame member 21, and the second frame member 22, respectively, and is screwed into a screw hole provided on the end surface of the microphone holder 30 on the Y1 side. ing. The engaging portion 50A has two through holes 52 and 53 divided into the Z1 side and the Z2 side, and the connecting member 23A can be inserted from the space provided between the through holes 52 and 53.

According to this modification, since the engaging portion 50A is fixed to the microphone holder 30 via the connecting member 23A, the microphone 10 can be easily arranged in the vicinity of the connecting member 23A. It becomes easy to suppress the positional deviation of the microphone 10.

Further, by providing the engaging portion 50A on the Y1 side (opposite side to the side where the subject is located) of the frame body 20, the rod-shaped member 40 moves away from the microphone 10 and the subject, so that the rod-shaped member for the sound measurement result is obtained. The influence of the member 40 can be reduced.

Although some embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments and includes various variations.

In the above-described embodiment, examples of the microphone array having a plurality of microphones for detecting the sound generated in the subject are given, but the present invention is not limited to these examples. In the present invention, sound may be detected as described above, or various physical quantities other than sound (for example, vibration, heat, magnetism, capacitance, light, etc.) may be detected. That is, the present invention can also be applied to a sensor array having a plurality of sensors that detect a predetermined physical quantity. In this case, the “microphone” in the above-described embodiment may be read as a “sensor”, and the “sound” may be read as a “physical quantity to be sensed”.

DESCRIPTION OF SYMBOLS 1... Microphone array, 10... Microphone, 11... Sound hole, 12... End surface, 15... Cable, 20... Frame body, 21... 1st frame member, 22... 2nd frame member, 23, 23A... Connecting member, 24... Nut, 30... Microphone holder, 31... Gripping portion, 32... Abutting surface, 40... Rod-shaped member, 50, 50A... Engaging portion, 51-53... Through hole, 60... Cable clamp, 70... Cable guide portion, P1 ... 1st virtual plane, P2... 2nd virtual plane, P3... 3rd virtual plane, AX... axis

Claims (8)

A plurality of microphones for detecting sound generated in the subject,
A frame arranged to face the subject,
A plurality of microphone holders that are provided in the frame body and respectively hold one of the microphones,
The frame is
A plurality of rod-shaped first frame members,
A plurality of rod-shaped second frame members,
A plurality of connecting members that connect the plurality of first frame members and the plurality of second frame members, and the plurality of first frame members are arranged in parallel with each other along a first virtual plane,
The plurality of second frame members are arranged in parallel with each other along a second virtual plane parallel to the first virtual plane,
When viewed from a direction normal to the first virtual plane and the second virtual plane, the plurality of first frame members and the plurality of second frame members intersect at a plurality of intersections,
One of the connecting members connects one of the first frame member and one of the second frame members at one of the intersecting portions so as to be rotatable about an axis parallel to the normal direction,
Each of the plurality of microphone holders is fixed to the one connecting member,
Microphone array. The microphone has a sound hole for introducing a sound to be detected,
The microphone holder holds the microphone so that the shaft of the connecting member fixed to the microphone holder and the sound hole overlap.
The microphone array according to claim 1. A plurality of rod-shaped members arranged in parallel with each other along a third virtual plane parallel to the first virtual plane and the second virtual plane;
A plurality of engaging portions that engage with each one of the rod-shaped members,
The plurality of engaging portions are fixed to the respective one different connecting member,
One of the rod-shaped members overlaps with the two or more intersecting portions when viewed from the normal direction, and the two or more engaging members fixed to the two or more connecting members located at the two or more intersecting portions. Part is engaged,
One of the engaging portions that engages with one of the rod-shaped members is allowed to move in a direction parallel to the longitudinal direction of the one of the rod-shaped members, and regulates relative rotation with respect to the one of the rod-shaped members. Will be
The microphone array according to claim 1. The longitudinal direction of the rod-shaped member is parallel to a bisector of an angle formed by the first frame member and the second frame member when viewed from the normal direction.
The microphone array according to claim 3. The engagement portion includes a through hole into which the rod-shaped member is inserted along the longitudinal direction.
The microphone array according to claim 3 or 4. The engaging portion is
Formed integrally with the microphone holder,
Or
Fixed to the microphone holder via the connecting member that penetrates the first frame member and the second frame member,
The microphone array according to claim 5. The microphone is connected to a cable for transmitting a sound detection signal,
At least one cable clamp for fixing the cable of one of the microphones to the microphone holder of the one microphone;
The cable clamp fixes the cable to the microphone holder via the connecting member penetrating the first frame member and the second frame member,
The microphone array according to claim 1. The microphone is connected to a cable for transmitting a sound detection signal,
Viewed from the normal direction, at least one cable guide portion for guiding the cable in a direction parallel to the bisector of the angle formed by the first frame member and the second frame member,
The microphone holder is fixed to one connecting member, and is fixed to another one connecting member adjacent to the one connecting member in a direction parallel to the bisector. Guiding the cable of the microphone held in
The microphone array according to claim 1.

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