JP2009055500A - Sound pickup device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To let a user easily recognize sound pickup orientation without performing any complicate setting. <P>SOLUTION: A sound pickup device includes long individual sound pickup units 10, 11 and 12 whose front sides are respectively formed with mesh plates 300, 310 and 320. The individual sound pickup units 10, 11 and 12 are respectively provided with microphone arrays 200, 210 and 220, and microphones 201 to 204, 211 to 214, and 221 to 224 configuring each microphone array are arranged so that the front directions of the individual sound pickup units 10, 11 and 12 can be set as sound pickup ranges. The individual sound pickup units 10, 11 and 12 are connected so as to be rotatable by connecting parts 501 and 502. When the individual sound pickup units 10, 11 and 12 are rotated with the connecting parts 501 and 502 as a reference, the position relation of the sound collection range is changed according to the position relation of the individual sound pickup units 10, 11 and 12. Thus, the sound pickup orientation is changed as a whole sound pickup unit. As a result, it is possible to visualize the change of the sound pickup orientation of the sound pickup device. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a sound collection device including a plurality of microphones.

  Conventionally, various sound collecting devices in which a plurality of microphones are arranged in an array have been devised.

For example, in Patent Document 1, a plurality of microphones are arranged in an array to form a microphone array, and signal level variable processing and delay processing are performed on the collected sound signals of each microphone of the microphone array, A directional microphone device that realizes a desired sound collection directivity as an entire microphone array is disclosed.
JP-A-1-29358

  However, in the microphone device as shown in Patent Document 1, in order to realize a desired sound collection directivity, level variable processing and delay processing must be set in detail, and the positional relationship between a plurality of microphones changes. Since the sound collection directivity changes without the user, the user cannot know the current directivity at a glance.

  Accordingly, an object of the present invention is to provide a sound collection device that allows a user to easily recognize sound collection directivity without performing complicated settings.

  The sound collecting device according to the present invention includes a plurality of individual casings and connecting means for connecting the individual casings to each other so as to be rotatable. Each individual housing has a sound collection directivity, and includes sound collection means for generating a directional sound collection signal corresponding to the sound collection directivity, and the sound collection directivity can be visually confirmed. With special features. The directional sound pickup signal generated by the sound pickup means of each individual casing is input to the sound signal processing means, and the sound signal processing means generates an output sound signal using these directional sound pickup signals. .

  In this configuration, when the plurality of individual casings connected by the connecting means are appropriately rotated based on the connecting means, the sound collection range is determined according to the positional relationship between the plurality of individual casings after the rotation. At this time, the feature part indicating the sound collection direction is provided in each individual casing, which suggests that the sound collection range desired by the user is set. As a result, the user can set a desired sound collection range by moving a plurality of individual casings as appropriate while looking at the characteristics of each individual casing and the positional relationship between the individual casings.

  Further, the sound collecting means of the sound collecting device of the present invention includes a microphone array in which a plurality of microphones are arranged in a predetermined pattern, and a directional sound collecting based on sound collecting signals of the plurality of microphones constituting the microphone array. Sound collection control means for forming a signal.

  In this configuration, a directional sound collection signal is specifically formed by the microphone array and the sound collection control means. Thereby, a plurality of sound collection directivities are formed for each sound collection means by delay control and amplitude control of the sound collection control means. That is, it is easy to make the sound collecting directivities the same for all the sound collecting means, or to make the sound collecting directivities different for each sound collecting means.

  Also, the microphone array of the sound collecting device of the present invention has a plurality of microphones arranged in a straight line, and these microphones have the same direction perpendicular to the arrangement direction as the center of each sound collecting range. Are arranged as follows. The sound collection control means realizes a sound collection directivity characteristic of a plane including the arrangement direction and the same vertical direction.

  In this configuration, as a more specific configuration of the microphone array, a simple structure easy to understand for the user in which microphones are arranged in a straight line is used. The sound collection direction is set to one plane perpendicular to the microphone arrangement direction, so that the user can easily understand. This makes it easier to understand when the user realizes the desired directivity as described above.

  Further, in the sound collecting device of the present invention, the individual casing has a long shape along the arrangement direction of the microphones. The connecting means is installed at one end or both ends of the individual casing in the longitudinal direction, and each individual casing is linearly arranged so that the sound collection directivity of each sound collecting means is on the same side with respect to each individual casing. It connects and rotates, maintaining the state which the plane which has the said characteristic sound collection directivity of each sound collection means corresponds.

  In this configuration, the shape of the individual casing is also long and conforming to the microphone arrangement of the microphone array, making it easy for the user to understand. In addition, the sound collecting means of each individual casing in the state of the individual casing row The sound collection direction is easy to understand.

  In the sound collecting device of the present invention, all sound collecting means generate directional sound collecting signals having the same directivity pattern, and the sound signal processing means outputs all the directional sound collecting signals by adding them. Generate an audio signal.

  In this configuration, since the sound collecting means of all the individual casings has the same directivity, directivity that can be clearly understood from the arrangement state of the visually recognized individual casings can be obtained. Thereby, the user can obtain desired sound collection directivity more intuitively and easily while looking at the arrangement of the individual housings.

  According to the present invention, since the sound collection range is determined according to the positional relationship between the individual casings connected by the connecting means, the user can appropriately view the characteristic portion of each individual casing and the positional relationship between the individual casings. The desired sound collection range can be easily and reliably set by operating the connecting means.

A sound collection device according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a three-view diagram of one form of the sound collecting device of the present embodiment, FIG. 1 (A) is a plan view, FIG. 1 (B) is a front view, and FIG. 1 (C) is a side view. In the following description, the coordinate system is set so that the plan view state is the XY plane, the front view state is the ZX plane, and the side view state is the YZ plane. In this case, the right direction in plan view and front view is the + X direction, the left direction is -X direction, the down direction in plan view is the + Y direction, the up direction is -Y direction, and the up direction in front view and side view is + Z. The coordinate system is set so that the direction and the downward direction are the -Z direction.

  The sound collection device includes individual sound collection devices 10, 11, and 12 and connecting portions 501 and 502 that connect the individual sound collection devices 10, 11, and 12 so as to be rotatable.

  The individual sound collector 10 has a long casing 100 whose width is sufficiently longer than the thickness and height, and the four surfaces of the long shape extending along the width direction of the casing 100 are individual sound collectors. 10 front, back, top, and bottom. In the example of FIG. 1, the surface facing the + Y direction is the front surface, and the surface facing the -Y direction is the back surface. Further, the surface facing the + Z direction is the top surface, and the surface facing the -Z direction is the bottom surface.

  Microphones 201 to 204 are arranged in the housing 100, and the microphones 201 to 204 constitute the microphone array 200 by being arranged at a predetermined interval along the width direction. The microphones 201 to 204 all have the same structure and sound collection characteristics, and have sound collection characteristics in which the front direction of the individual sound collector 10 is the sound collection range.

  A mesh plate 300 is installed on the front surface of the housing 100. The mesh plate 300 has a shape that covers the front side of the microphones 201 to 204 constituting the microphone array 200.

  With such a structure, sound coming from the front side of the individual sound collector 10 passes through the mesh plate 300 and is collected by the microphones 201 to 204. In addition, in this way, by making only the front surface of the housing 100 the mesh structure, the user can easily recognize that the surface side of the mesh structure is the sound collection side.

  At both ends in the width direction of the housing 100, connection mechanisms for configuring the connection portions 501 and 502 are formed. These connecting mechanisms have a general structure that constitutes a conventional rotating mechanism together with a connecting mechanism of other casings 110 and 120 to be connected.

  Similar to the case 100 of the individual sound collector 10, the individual sound collector 11 has a long case 110 whose width is sufficiently longer than the thickness and height, and along the width direction of the case 110. The four surfaces formed of elongated shapes serve as a front surface, a back surface, a top surface, and a bottom surface of the individual sound collector 11. In the example of FIG. 1, the surface facing the + Y direction is the front surface, and the surface facing the -Y direction is the back surface. Further, the surface facing the + Z direction is the top surface, and the surface facing the -Z direction is the bottom surface.

  Microphones 211 to 214 are arranged in the casing 110, and the microphones 211 to 214 constitute a microphone array 210 by being arranged at a predetermined interval along the width direction. The microphones 211 to 214 all have the same structure and sound collection characteristics, and have sound collection characteristics in which the front direction of the individual sound collector 11 is the sound collection range.

  A mesh plate 310 is installed on the front surface of the housing 110. The mesh plate 310 has a shape covering the front side of the microphones 211 to 214 constituting the microphone array 210.

  With such a structure, sound coming from the front side of the individual sound collector 11 passes through the mesh plate 310 and is collected by the microphones 211 to 214. In addition, in this way, by making only the front surface of the housing 110 a mesh structure, the user can easily recognize that the surface side of the mesh structure is the sound collection side.

  A connecting mechanism for forming the connecting portion 501 is formed at one end in the width direction of the housing 110. These connecting mechanisms have a general structure that constitutes a conventional rotating mechanism together with the connecting mechanism of the casing 100 to be connected. The end of the casing 110 on the side facing the connecting portion 501 has a shape that is narrowed down in the Y direction so that the interval between the front wall and the back wall is gradually narrowed.

  The individual sound collector 12 has a long case 120 whose width is sufficiently longer than the thickness and height, similar to the cases 100 and 110 of the individual sound collectors 10 and 11. The four surfaces that are elongated along the direction are the front, back, top, and bottom of the individual sound collector 12. In the example of FIG. 1, the surface facing the + Y direction is the front surface, and the surface facing the -Y direction is the back surface. Further, the surface facing the + Z direction is the top surface, and the surface facing the -Z direction is the bottom surface.

  Microphones 221 to 224 are arranged in the housing 120, and the microphones 221 to 224 constitute the microphone array 220 by being arranged at a predetermined interval along the width direction. The microphones 221 to 224 all have the same structure and sound collection characteristics, and have sound collection characteristics with the sound collection range in the front direction of the individual sound collector 12.

  A mesh plate 320 is installed on the front surface of the housing 120. The mesh plate 320 has a shape that covers the front side of the microphones 221 to 224 constituting the microphone array 220.

  With such a structure, sound coming from the front side of the individual sound collector 12 passes through the mesh plate 320 and is collected by the microphones 221 to 224. In addition, by making the mesh structure only on the front surface of the housing 120 as described above, the user can easily recognize that the surface side of the mesh structure is the sound collection side.

  A connection mechanism for forming the connection portion 502 is formed at one end of the housing 120 in the width direction. These connecting mechanisms have a general structure that constitutes a conventional rotating mechanism together with the connecting mechanism of the casing 100 to be connected. The end of the housing 120 on the side facing the connecting portion 502 has a shape that is narrowed down in the Y direction so that the distance between the front wall and the back wall gradually decreases.

  The connecting portion 501 includes the above-described connecting mechanism of the casing 100, the connecting mechanism of the casing 110, and a support member that supports them in the Z-axis direction. With this structure, the individual sound collector 10 and the individual sound collector 11 are connected in a structure that can be rotated on the XY plane with the shaft support member as a rotation axis. At this time, in a state where the individual sound collector 10 and the individual sound collector 11 are linearly connected along the X-axis direction, the front of the individual sound collector 10 and the front of the individual sound collector 11 are both + Y The housing 100 and the housing 110 are coupled so as to face the direction.

  The connecting portion 502 includes the above-described connecting mechanism of the casing 100, the connecting mechanism of the casing 120, and a support member that supports these in the Z-axis direction. With this structure, the individual sound collector 10 and the individual sound collector 12 are connected to each other with a structure capable of rotating on the XY plane with the shaft support member as a rotation axis. At this time, in a state where the individual sound collector 10 and the individual sound collector 12 are linearly connected along the X-axis direction, the front of the individual sound collector 10 and the front of the individual sound collector 12 are both + Y The housing 100 and the housing 120 are coupled so as to face the direction. Thereby, all the front surfaces of the individual sound collectors 10, 11, and 12 are connected so that the + Y direction is directed and the individual sound collectors 10, 11, and 12 are rotated on the XY plane.

The sound collection device includes the functional blocks shown in FIG. 2 in addition to the mechanical features described above. FIG. 2 is a block diagram illustrating a configuration of main functional units of the sound collection device.
The sound collection device includes the above-described microphones 201 to 204 (microphone array 200), microphones 211 to 214 (microphone array 210), microphones 221 to 224 (microphone array 220), a collected sound processing unit 401, and an output unit 402. With. The microphones 201 to 204, 211 to 214, and 221 to 224 collect sound and generate individual sound collection signals. The collected sound processing unit 401 receives each individual collected sound signal and adds the individual collected sound signals to generate an output sound signal. That is, an output audio signal is generated that is collected by the sound collection directivity obtained by superimposing the sound collection directivities 410, 411, and 412 of the individual sound collectors 10, 11, and 12 as shown in FIG. FIG. 3 is a diagram showing the sound collection directivity when the individual sound collectors 10, 11, and 12 are arranged in a straight line. The sound collection directivities 410, 411, 412 of the individual sound collectors 10, 11, 12 are wider in the width direction than the widths of the individual sound collectors 10, 11, 12, and each individual sound collector. The front side of 10, 11, 12 is defined as a sound collection range. These sound collection directivities 410, 411, and 412 have substantially the same directivity patterns with respect to the individual sound collectors 10, 11, and 12 corresponding thereto. Thereby, for example, as shown in FIG. 3, when the individual sound collectors 10, 11, and 12 are arranged in a straight line, the output sound signal is output from the sound collecting device as shown in FIG. The sound is generated by the sound collected by the sound collection directivity 601 in which the sound collection range is a predetermined range wider than both ends of the arrangement direction. When the individual sound collectors 10, 11, 12 are rotated by the connecting portions 501, 502 and the positional relationship changes, the sound collection based on the superposition of the respective sound collection directivities 410, 411, 412 according to the positional relationship. An output audio signal is generated with directivity (corresponding to directivities 601 to 605 and 610 shown in FIGS. 4, 5, and 6 described later).

  The output unit 402 converts the output audio signal from the collected sound processing unit 401 into a format according to the specification of the output destination and outputs the converted signal. For example, if the output destination is a speaker device, the output audio signal is output as it is, and if the output destination is a network, the data is converted according to the communication data specifications of the network and output. The collected sound processing unit 401 and the output unit 402 may be installed inside one of the casings 100, 110, and 120, and a control casing (separate from these casings 100, 110, and 120 ( (Not shown) may be provided and installed in the control housing.

Next, each form of the sound collection device, which is a positional relationship between the individual sound collection units, and sound collection directivity in each form will be described with reference to FIGS.
4-6 is a figure which shows each figure of each sound collection apparatus, and each sound collection directivity. Here, an individual mode name is set for each appearance, and the mode name will be described. FIG. 4A is a diagram showing a straight mode state, and FIG. 4B is a diagram showing a wide mode state. FIG. 5A is a diagram illustrating a state of the super wide mode, and FIG. 5B is a diagram illustrating a state of the all-round mode. FIG. 6A is a diagram illustrating a state of the narrow directivity mode, and FIG. 6B is a diagram illustrating an isolation mode. In addition, the dashed-dotted line shown in FIG. 4 (A), (B), FIG. 5 (A), (B), and FIG. 6 (A) is the reference axis Dx extended along an X direction.

  In the case of the straight mode shown in FIG. 4A, the individual sound collectors 10, 11, and 12 of the sound collection device are arranged on a straight line such that the respective longitudinal directions are along the reference line Dx. In such an appearance, the front surfaces of the individual sound collectors 10, 11, and 12 face the + Y direction perpendicular to the reference axis Dx. Accordingly, the sound collection directivity of each of the individual sound collectors 10, 11, and 12 is a sound collection range that extends a predetermined amount in a direction parallel to the reference axis Dx, with the + Y direction perpendicular to the reference axis Dx being the center of the sound collection directivity. Will be. Then, by superimposing these, the sound collection device has a sound collection directivity 601 in which the sound collection range is a range wider than the width in the longitudinal direction of the sound collection device in the direction parallel to the reference axis Dx. Is formed. Due to such sound collection directivity 601, for example, the utterance sound of two speakers 900 </ b> A and 900 </ b> B who are present in the range between both ends along the longitudinal direction of the sound collection device on the front side of the sound collection device. Can be picked up.

  In the case of the wide mode shown in FIG. 4B, the individual sound collector 10 is arranged so that the longitudinal direction is along the reference axis Dx, and the individual sound collectors 11 and 12 are on the back side of the individual sound collector 10 (− It is arranged in a state rotated in the Y direction). In this form, the sound collecting directivity of the individual sound collector 10 is centered in the + Y direction perpendicular to the reference axis Dx, and the sound collecting directivity of the individual sound collector 11 rotates from the + Y direction to the −X direction. The direction shifted by the angle becomes the center of directivity, and the sound collection directivity of the individual sound collector 12 becomes the center of directivity by the direction shifted by the rotation angle from the + Y direction to the + X direction. Then, by superimposing these, the sound collection device has a sound collection directivity 602 in which the sound collection range is a wider range along the reference axis Dx than the straight mode described above. With such sound collection directivity 602, for example, three people including speakers who do not fit in the range between both ends along the longitudinal direction of the sound collection device on the front side (+ Y direction side) of the sound collection device. Voices of speakers 900A, 900B, and 900C can be collected.

  In the case of the super wide mode shown in FIG. 5A, the individual sound collector 10 is arranged so that the longitudinal direction is along the reference axis Dx, and the individual sound collectors 11 and 12 are further individual sound collectors than in the wide mode. 10 is arranged in a state of being rotated to the back side (−Y direction). At this time, the individual sound collector 11 is rotated to a position where the front direction is directed to the −X direction, and the individual sound collector 12 is rotated to a position where the front direction is directed to the + X direction. In this form, the sound collecting directivity of the individual sound collector 10 is the center of directivity in the + Y direction perpendicular to the reference axis Dx, and the sound collection directivity of the individual sound collector 11 is in the −X direction parallel to the reference axis Dx. Becomes the center of directivity, and the sound collection directivity of the individual sound collector 12 is the center of directivity in the + X direction parallel to the reference axis Dx. Then, by superimposing these, the sound collecting device, when the sound collecting device is the origin position of the XY plane, exceeds 180 degrees from the −X direction to the + X direction and exceeds 360 degrees to 360 degrees. For example, a sound collection directivity 603 having a sound collection range of about 270 degrees is formed. With such sound collection directivity 603, for example, it is possible to collect voices of speakers 900A to 900E seated in three of four directions on a plane perpendicular to each other surrounding the sound collection device.

  In the all-round mode shown in FIG. 5B, the individual sound collector 10 is arranged so that the longitudinal direction thereof is along the reference axis Dx, and the individual sound collectors 11 and 12 are more individually sound-collected than in the super wide mode. It arrange | positions in the state rotated to the back side (-Y direction) of the container 10. FIG. At this time, the end of the individual sound collector 11 facing the connecting portion 501 and the end of the individual sound collector 12 facing the connecting portion 502 are rotated to a position where they abut. In this state, the sound collecting directivity of the individual sound collector 10 is centered on the + Y direction perpendicular to the reference axis Dx, and the sound collecting directivity of the individual sound collector 11 is shifted from the −X direction to the −Y direction. This direction becomes the center of directivity, and the sound collection directivity of the individual sound collector 12 becomes the center of directivity when shifted from the + X direction to the −Y direction. Then, by superimposing these, as the sound collection device, a sound collection directivity 604 having a sound collection range in the entire periphery centering on the sound collection device is formed. With such sound collection directivity 604, for example, sounds generated by the speakers 900A to 900F who are present so as to surround the sound collection device can be collected.

  In the narrow directivity mode shown in FIG. 6 (A), the individual sound collector 10 is arranged so that the longitudinal direction is along the reference axis Dx, and the individual sound collectors 11 and 12 are on the front side of the individual sound collector 10 ( + Y direction). In this state, the sound collecting directivity of the individual sound collector 10 is the center of directivity in the + Y direction perpendicular to the reference axis Dx, and the sound collecting directivity of the individual sound collector 11 is a rotation angle from the + Y direction to the + X direction. The direction shifted by the amount becomes the center of directivity, and the sound collection directivity of the individual sound collector 12 becomes the center of directionality shifted by the rotation angle from the + Y direction to the −X direction. Then, by superimposing these, the sound collection device forms sound collection directivity 605 in which a narrower range along the reference axis Dx than the above-described straight mode is a sound collection range.

  With such sound collection directivity 605, for example, only the utterance sound of one speaker 900A who is present at the approximate center in the longitudinal direction of the sound collection device is collected on the front side (+ Y direction side) of the sound collection device. Can sound.

  In the case of the isolation mode shown in FIG. 6B, the number of individual sound collectors is not three as in each of the above-described forms, but the number that surrounds the speaker 900A (eight in the figure) is required. In such an isolation mode, the individual sound collectors 10 to 17 are arranged so that the front faces the inside of the space surrounded by all the individual sound collectors 10 to 17. The speaker 900A is present in the space surrounded by the individual sound collectors 10-17. With such an arrangement, the sound collection directivity 610 is formed in which the sound collection range is only within the space surrounded by the individual sound collectors 10 to 17. With such sound collection directivity 610, it is possible to collect only the voice of the speaker 900A clearly distinct from the external sound.

  As described above, by using the configuration of the present embodiment, the sound collection ranges that are set on the front side of each of the plurality of individual sound collectors that rotate relative to each other and are superimposed are overlapped and overlapped. An output sound signal corresponding to the pattern of the entire sound collection range can be generated. Thus, the user can easily confirm the sound collection range of the sound collection device by looking at the appearance of the sound collection device, that is, the positional relationship and the front direction of the plurality of individual sound collection devices. As a result, the user can realize a desired sound collection range (sound collection directivity) simply by rotating a plurality of individual sound collectors with reference to the connecting portion.

  In the above description, an example in which four microphones are arranged in one individual sound collector has been described. However, the number of microphones arranged in the individual sound collector may be appropriately set according to specifications. Furthermore, although the example in which the same number of microphones is arranged in all the individual sound collectors has been shown, the number of microphones may be set individually for each individual sound collector.

  In the above description, the example in which the individual sound pickup signals are simply added by the sound pickup sound processing unit 401 has been described. However, the collected sound processing unit 401 may form a collected sound beam corresponding to each appearance. In this case, the sound collection device includes a rotation angle detection mechanism such as a rotary encoder at each connecting portion. The sound collection device stores a sound collection beam pattern for each form composed of a combination of rotation angles (rotation angles), and a sound collection sound that realizes a sound collection beam pattern according to the detected combination of rotation angles. A control unit that causes the processing unit 401 to perform sound collection beam control is provided. By performing such a configuration and processing, more detailed and highly accurate sound collection directivity can be realized, and sound collection performance can be improved.

  In the above description, the mechanism that rotates on the XY plane has been described as an example. However, the sound collection directivity can be set more flexibly by making the connecting portion a structure that can be rotated in three dimensions. it can.

  In the above description, the sound collecting device has been described as an example, but a sound emitting and collecting device or a voice communication device having the function of the sound collecting device may be used.

  In the above description, the mesh plate is installed on the front side so that the front direction can be clearly seen. However, a mark or the like that shows the front direction, that is, the sound collecting direction may be provided on the housing.

It is a three-view figure of the one appearance state of the sound collection device of this embodiment. It is a block diagram which shows the structure of the main function parts of a sound collection device. It is a figure which shows the sound collection directivity at the time of arranging each individual sound collector 10, 11, and 12 in a straight line form. It is a figure which shows each appearance and each sound collection directivity of a sound collection apparatus (straight mode, wide mode). It is a figure which shows each figure of a sound-collecting apparatus, and each sound-collection directivity (super wide mode, all-around mode). It is a figure which shows each appearance and each sound collection directivity of a sound collection device (narrow directivity mode, isolation mode).

Explanation of symbols

  10 to 17-individual sound collector, 100, 110, 120-housing, 200, 210, 220-microphone array, 201-204, 211-214, 221-224, microphone, 300, 310, 320-mesh plate, 401-Acquisition sound processing unit, 402-Output unit, 501, 502-Concatenation unit

Claims (5)

Each has sound collection directivity, provided with sound collection means for generating a directional sound collection signal corresponding to the sound collection directivity, and provided with a characteristic part that allows visual confirmation of the sound collection directivity Multiple individual enclosures;
Coupling means for pivotally coupling the plurality of individual housings to each other;
Audio signal processing means for generating an output audio signal based on the directional sound pickup signal;
A sound collecting device. The sound collecting means is
A microphone array in which a plurality of microphones are arranged in a predetermined pattern;
Sound collection control means for forming the directional sound collection signal based on sound collection signals of a plurality of microphones constituting the microphone array;
The sound collection device according to claim 1, comprising: The microphone array includes a plurality of microphones arranged in a straight line.
The plurality of microphones are arranged so that the same direction perpendicular to the arrangement direction is the center of each sound collection range,
The sound collection device according to claim 2, wherein the sound collection control unit realizes a sound collection directivity characteristic in a plane including the arrangement direction and the perpendicular same direction. The individual casing has a long shape along the arrangement direction of the microphones,
The connecting means is installed at one end or both ends of the individual casing in the longitudinal direction, and each individual casing is wired so that the sound collection directivity of each sound collecting means is on the same side with respect to each individual casing. The sound collection device according to claim 3, wherein the sound collection devices are connected to each other and rotate while maintaining a state in which the planes having the characteristic sound collection directivities of the sound collection means coincide with each other. The directional sound collection signal is the same for all sound collection means,
5. The sound collection device according to claim 1, wherein the sound signal processing means generates the output sound signal by adding all directional sound collection signals.

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