JP2006121202A - Sound input output apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sound input output apparatus capable of revising the number of microphones and speakers depending on positions of a talker and a listener located before the apparatus and grasping which of the microphones is usable. <P>SOLUTION: The sound input output apparatus 2 is provided with a plurality of planar capacitor devices 11 arranged in a matrix form and collects/emits sound waves by activating each of the planar capacitor devices like the speaker or the microphone. Further, the sound input output apparatus 2 revises the number and the arrangement of the planar capacitor devices 11 acting like the speaker or the microphone depending on the positions of the talker and the listener. Moreover, each light emitting section 27 located in the vicinity of each of the planar capacitor devices 11 emits light when the planar capacitor device 11 is operated as the microphone and the color of a light emitting element 28 or the number of lighted light emitting elements 28 are changed depending on the sound volume of the sound waves collected by the planar capacitor devices 11. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an acoustic input / output device capable of switching and operating a plurality of audio input / output devices individually as a speaker or a microphone.

  Various remote conference systems have been proposed for performing remote conferences by connecting so that voice and video can be exchanged between remote conference rooms. In the remote conference system, each conference room is provided with a microphone that collects voices spoken by conference attendees and a speaker that emits voices collected in the conference room on the other side. As an installation form of the microphone and the speaker, a form of providing a microphone for each attendee, a form of providing a microphone for the entire conference room, a form of providing a speaker or earphone for each attendee, a form of providing a speaker for the entire conference room Various forms are conceivable.

  Among these, in the form of providing a microphone for each attendee, conventionally, one or a plurality of speakers are shared by a plurality of attendants without providing a speaker for each attendee. For this reason, the speaker projected on the display and the voice of the speaker are heard from different positions, and there is a problem that the sense of reality is not high.

Therefore, with respect to such a problem, there is provided a remote conference information transmitting device and information receiving device which can provide a microphone and a speaker for each conference attendant and can realize a remote conference full of a sense of reality using one audio channel. (For example, refer to Patent Document 1).
JP 07-58859 A

  In the conventional remote conference system, a plurality of microphones and speakers must be prepared according to the number of meeting attendees, and wiring must be performed according to the seat arrangement, and the number of meeting attendees has been changed. In such a case, the number of microphones and speakers has to be changed, and there is a problem that the setting operation of the conference room is very complicated in order to perform a remote conference.

  Further, even during a teleconference, there may be situations where a microphone is intensively required or a speaker is intensively required. In this case, however, the number of microphones and speakers cannot be changed because the conference is in progress, and the voices spoken by the speaker (speaker) cannot be emitted to all listeners. In some cases, the voices spoken by the (speaker) could not be collected well, resulting in a meeting lacking realism.

  In addition, even if multiple microphones are prepared, not all microphones may be available, and it is difficult for the speaker to know which microphone is available, so a speaker speaks into the microphone. When the microphone is not usable, the voice of the speaker may not be collected.

  Therefore, the present invention is very easy to set up, and the number of microphones and speakers can be easily changed according to the position of the speaker or listener in front of the device, and which microphone can be used. An object of the present invention is to provide an acoustic input / output device that can easily grasp the above.

  The present invention has the following configuration as means for solving the above problems.

(1) a voice input / output device capable of collecting or emitting sound waves;
A sound output signal that is connected to the voice input / output device via a changeover switch, amplifies an input signal, outputs the amplified signal to the voice input / output device, and emits a sound wave corresponding to the input signal from the voice input / output device Amplifying means;
A sound collection signal amplifying means connected to the sound input / output device via a changeover switch and amplifying an output signal corresponding to the sound wave collected by the sound input / output device;
Including the change-over switch and switching the change-over switch to connect the sound input / output device and the sound emission signal amplifying means to operate as a speaker that emits sound waves from the sound input / output device; Connection switching means for connecting the input / output device and the sound collection signal amplification means, and operating the sound input / output device as a microphone for collecting sound waves;
Including a plurality of acoustic devices having voice input / output devices arranged in a matrix,
Control means for individually outputting a control signal to connection switching means of each acoustic device in order to operate each of the voice input / output devices as a microphone or a speaker;
A light emitting means disposed in the vicinity of the voice input / output device and emitting light when the voice input / output device is operated as a microphone;
It is provided with.

  In this configuration, a plurality of audio input / output devices are arranged in a matrix, and the changeover switch is switched by a control signal output from the control means to the connection switching means of each acoustic device, so that the audio input / output devices are connected to the speakers. Or it works as a microphone. When the voice input / output device operates as a microphone, the light emitting means in the vicinity emits light. Therefore, in the acoustic input / output device, only the light emitting means provided in the vicinity of the voice input / output device operated as a microphone emits light, so that it is possible to easily determine which voice input / output device is operating as a microphone. In addition, since the operation of the voice input / output device can be easily switched, the voice input / output device that operates as a microphone and the speaker operates according to the environment in which the acoustic input / output device is installed and the state at that time. The quantity and arrangement of voice input / output devices can be changed.

  (2) The light emitting means includes a plurality of light emitters, and the number of light emitters that emit light changes according to the volume of sound waves propagated from outside.

  In this configuration, the plurality of light emitters of the light emitting means are configured such that the quantity of light emitted changes according to the intensity of the sound wave propagated from the outside. Therefore, it is possible not only to determine which voice input / output device is operating as a microphone, but also to grasp the volume of sound waves collected by the voice input / output device according to the quantity of light emitted by the light emitter. Can do. Further, when the speaker speaks toward the sound input / output device, the voice volume can be adjusted while checking the light emitting means.

  (3) The light emitting means includes a light emitter whose emission color changes according to the volume of a sound wave propagated from the outside.

  In this configuration, the light emitter of the light emitting means is configured so that the emission color changes according to the intensity of the sound wave propagated from the outside. Therefore, not only can it be determined which voice input / output device is operating as a microphone, but also the volume of sound waves can be grasped according to the color of light emitted from the light emitter of the light emitting means.

  According to the present invention, a plurality of audio input / output devices of an acoustic device can be arranged in a matrix, and the connection of each acoustic device can be switched to use the audio input / output device as a microphone or speaker. Can be easily changed according to the position of the speaker or listener and the usage pattern, and can function efficiently according to the purpose. The light emitting means provided in the vicinity of the voice input / output device emits light when the voice input / output device operates as a microphone, so that the speaker can determine which voice input / output device functions as a microphone. Can be easily grasped. In addition, the volume of the collected sound wave can be easily grasped by configuring so that the number of light-emitting bodies or the emission color changes according to the sound volume of the sound wave collected by the voice input / output device.

  The acoustic input / output device of the present invention collects and emits sound waves by arranging a plurality of audio input / output devices in a matrix and operating each audio input / output device as either a speaker or a microphone. be able to. The acoustic input / output device can change the quantity and arrangement of voice input / output devices (acoustic devices) that operate as speakers or microphones according to the positions of speakers and listeners.

  Further, light emitting means is provided in the vicinity of each voice input / output device, and when the voice input / output device is operated as a microphone, the light emitting means is configured to emit light. Therefore, a voice input / output device that operates as a microphone can be easily recognized. In addition, since the light emitting means changes the color of the illuminant according to the volume of the sound wave collected by the audio input / output device or the number of luminescence of the illuminant changes, for example, whether the volume of the voice uttered by the speaker is appropriate You can check whether.

  As an audio input / output device used in the acoustic input / output device of the present invention, a dynamic type, magnetic type, capacitor type speaker or the like may be used. As is well known, this kind of speaker can be used as a microphone, and can operate as a speaker or a microphone by connecting the sound emission signal amplification means and the sound collection signal amplification means to the speaker in a switchable manner. Can be made. In the following description, a case where a planar capacitor type device generally used as a capacitor type speaker is used as an audio input / output device will be described as an example.

  Details of the present invention will be described below. FIG. 1 is a schematic configuration diagram of an acoustic device according to an embodiment of the present invention, where (A) is a cross-sectional view illustrating a schematic configuration of a planar capacitor type device, and (B) is a case where the planar capacitor type device is used as a speaker. (C) is a circuit diagram when a planar capacitor type device is used as a microphone. As shown in FIG. 1A, the planar capacitor type device 11 is composed of a conductive thin film having no air permeability between two flat fixed electrodes (positive electrode and negative electrode) 12 and 13 which are meshed. A flat diaphragm 14 is arranged to face the fixed electrodes 12 and 13.

  As shown in FIG. 1B, when the planar capacitor type device 11 is operated as a speaker and used, an amplifier (power amplifier) 21 and a bias power source 22 are connected to the planar capacitor type device 11. That is, the audio signal input from the input terminal 20 is amplified by the voltage amplifier 21P, and a voltage corresponding to this signal is applied to the fixed electrode 13 on the front side of the planar capacitor type device 11, and the inverted voltage amplifier 21N. Then, the signal is amplified by inverting the polarity of the phase, and a voltage corresponding to this signal is applied to the fixed electrode 12 on the rear surface side of the planar capacitor type device 11. The diaphragm 14 is applied with a bias voltage from the bias power source 22, and vibrates due to the attractive force / repulsive force generated according to the potential difference between the fixed electrodes 12 and 13, thereby generating air vibrations that become sound waves.

  As shown in FIG. 1C, when the planar capacitor device 11 is used as a microphone, a differential amplifier 23 and a bias power supply 24 are connected to the planar capacitor device 11. That is, the fixed electrode 12 is connected to the inverting input terminal of the differential amplifier 23. The fixed electrode 13 is connected to the non-inverting input terminal of the differential amplifier 23. Further, a bias voltage is applied to the diaphragm 14 from a bias power source 24. The diaphragm 14 and the fixed electrodes 12 and 13 are electrostatically coupled, and the electrostatic capacity corresponding to the distance from the diaphragm 14 is applied to the fixed electrodes 12 and 13 by a bias voltage applied to the diaphragm 14. Has occurred. When a sound wave propagates from the outside, the vibration plate vibrates due to the sound wave, and the distance between the vibration plate 14 and the fixed electrodes 12 and 13 is changed by this vibration. A minute current is generated due to the change, and a signal voltage obtained by flowing the minute current through a resistance element having a high resistance value is amplified by a differential amplifier, so that a propagated sound wave can be extracted as a sound signal. .

  Note that the bias voltage applied to the diaphragm 14 may be set to a different value when used by operating as a microphone and when used by operating as a speaker. For example, the bias voltage when used while operating as a speaker may be set to a value having a larger absolute value than the bias voltage when used while operating as a microphone.

  Next, switching between the case where the planar capacitor type device is operated and used as a microphone and the case where the planar capacitor device is used as a speaker will be described. In the acoustic apparatus of the present invention, as described with reference to FIG. 1, a planar capacitor type device can be switched and used as a speaker or a microphone. In the acoustic apparatus 1, the switching of the connection of the power amplifier 21, the bias power supply 22, the differential amplifier 23, and the bias power supply 24 to the planar capacitor type device 11 is switched by the switch 34.

  FIG. 2 is a block diagram illustrating a schematic configuration of the acoustic device. As shown in FIG. 2, the acoustic device 1 includes a planar capacitor device 11, a power amplifier 21, a bias power source 22, a differential amplifier 23, a bias power source 24, a light emission control circuit 26, a light emitting unit 27, and a switch 34. ing. The switch 34 includes double-throw switches 35 to 38 and a switch control terminal 39.

  In the switch 35, the first terminal 35 a is fixed to the output side of the non-inverting voltage amplifier 21 P of the power amplifier 21, the second terminal 35 b is fixed to the non-inverting input terminal of the differential amplifier 23, and the common terminal 35 c is fixed to the planar capacitor type device 11. Each is connected to the electrode 12. The switch 36 has a first terminal 36 a connected to the bias power source 22, a second terminal 36 b connected to the bias power source 24, and a common terminal 36 c connected to the diaphragm 14 of the planar capacitor type device 11. In the switch 37, the first terminal 37 a is the output terminal of the inverting voltage amplifier 21 N of the power amplifier 21, the second terminal 37 b is the inverting input terminal of the differential amplifier 23, and the common terminal 37 c is the fixed electrode 13 of the planar capacitor type device 11. Are connected to each other. In addition, a resistor (not shown) is connected between the inverting input terminal and the non-inverting input terminal of the differential amplifier 23 in order to suppress the influence of radiation noise and the like. The switch 38 has a first terminal 38 a connected to the ground GND, a second terminal 38 b connected to the power supply 40, and a common terminal 38 c connected to the light emission control circuit 26.

  In the switch 34, the switches 35 to 38 are set to perform the opening / closing operation in conjunction with the control signal input from the switching control terminal 39. That is, when the first control signal is input from the switching control terminal 39, all the switches 35 to 38 are switched to the first terminal side, and the acoustic device 1 operates as a speaker. When the second control signal is input from the switching control terminal 39, all the switches 35 to 38 are switched to the second terminal side and operate as a microphone. Thereby, according to the signal input from the switching control terminal 39, the acoustic apparatus 1 can be switched and used as a speaker or a microphone. Further, different signals are input to the light emission control circuit 26 in accordance with the control signal input from the switching control terminal 39.

  The light emission control circuit 26 is connected to the common terminal 38 c of the differential amplifier 23, the light emitting unit 27, and the switch 38 of the switch 34. When the second control signal is input to the light emission control circuit 26 from the switching control terminal 39 and the switch 34 is switched so that the acoustic device 1 operates as a microphone, the voltage of the power supply 40 is changed to the second terminal 38b of the switch 38. Applied. When this voltage is applied, the light emission control circuit 26 outputs a signal for causing the light emitting unit 27 to emit light in order to indicate that the acoustic device 1 functions as a microphone.

  Further, when the switch 34 is switched so that the acoustic device 1 operates as a microphone, the light emission control circuit 26 is output from the differential amplifier 23 according to the sound wave collected by the planar capacitor type device 11. A signal is input. In response to this signal, the light emission control circuit 26 outputs a signal for controlling the light emission quantity or the light emission color of the light emitting unit 27.

  Next, the detail of the light emission part 27 is demonstrated. FIG. 3 is an external view of the acoustic device. As shown in FIG. 3, the light emitting unit 27 includes a plurality of light emitting elements 28, and LEDs that emit a plurality of colors are used as the light emitting elements 28. In this case, when the acoustic device 1 is set to operate as a microphone, all the light emitting elements 28 emit light (light on) in the same color. And it is good to comprise so that the luminescent color of all the light emitting elements 28 may change according to the volume of the sound wave which the planar capacitor type device 11 collected. For example, when a three-color LED capable of selectively emitting green, orange, and red is used as the light emitting element 28, in a state where the acoustic device 1 is set to operate as a microphone (when there is no sound) All the light emitting elements 28 of the light emitting unit 27 are caused to emit green light. In addition, orange light is emitted until the volume of the collected sound wave reaches a certain level, and the luminance of the light emitting element 28 is changed according to the volume level. Further, when the sound volume exceeds a certain level, red is lit and the luminance of the light emitting element 28 is changed according to the sound volume level.

  The light emitting unit 27 can also emit light in another pattern. For example, as the plurality of light emitting elements 28 used in the light emitting unit 27, LEDs having a single color of light emission are used. In this case, when the acoustic device 1 is set to operate as a microphone, several light emitting elements 28 are caused to emit light (light on). And it is good to comprise so that the quantity of the light emitting element 28 to light-emit may change according to the volume of the sound wave which the planar capacitor | condenser type device 11 collected like the level meter of a recording machine. In the case of such a configuration, the emission color of the light emitting element 28 that is turned on when the volume is below a certain level, and the emission color of the light emitting element 28 that is turned on when the volume exceeds a certain level, Use different colors.

  In this way, it is possible to determine whether or not the acoustic device 1 is used as a microphone by changing the emission color of the light emitting unit 27 or changing the number of light emitting elements 28 that emit light, and the acoustic device 1. It is possible to confirm whether or not the sound wave collected by is at an appropriate volume.

  Next, the configuration of the acoustic input / output device will be described. FIG. 4 is a block diagram showing a schematic configuration of the sound input / output device. The sound input / output device 2 includes a plurality of sound devices 1 (three sound devices 1 are shown in FIG. 4), a switching control unit 41, an output sound processing control unit 42, an input sound processing control unit 43, and main control. Unit 44, human sensor 45, operation unit 46, storage unit 47, signal input terminal 48, signal output terminal 49, and control signal terminal 50.

  The switching control unit 41 is connected to the switching control terminal 39 of the switch 34 in each acoustic device 1 and outputs a control signal to perform switching for using each acoustic device 1 as a speaker or a microphone.

  The output sound processing control unit 42 is connected to the input terminal of each acoustic device 1. The output sound processing control unit 42 corrects the frequency characteristics of sound emitted from the sound device 1 when the planar capacitor device 11 that is a sound input / output device of the sound device 1 is used as a speaker. The output sound processing control unit 42 adjusts the output gain of sound emitted from the acoustic device 1 when the planar capacitor type device 11 is used as a speaker.

  The input sound processing control unit 43 is connected to the output terminal of each acoustic device 1. The input sound processing control unit 43 corrects the frequency characteristics of the sound collected by the sound device 1 when the planar capacitor device 11 of the sound device 1 is used as a microphone. Further, the input sound processing control unit 43 performs input gain adjustment of sound collected by the acoustic device 1 when the planar capacitor type device 11 is used as a microphone.

  The main control unit 44 outputs control signals to the switching control unit 41, the output audio processing control unit 42, and the input audio processing control unit 43, and controls the operations of these units.

  The human sensor 45 determines the presence or absence of a speaker or a listener in front of each acoustic device 1 of the acoustic input / output device 2. As the human sensor 45, for example, a photoelectric sensor or an infrared sensor is suitable.

  The operation unit 46 is used to input position information of a speaker or a listener and to set a use mode according to the usage mode of the sound input / output device 2.

  The storage unit 47 responds to the arrangement pattern of the planar capacitor type device 11 that operates as a microphone, the arrangement pattern of the planar capacitor type device 11 that operates as a speaker, and the arrangement pattern selected by another acoustic input / output device 2. One or more arrangement patterns are stored.

  The signal input terminal 48 is used to input a sound signal output from another sound input / output device 2, and a plurality of signals connected to the input terminal 20 of each sound device 1 via the output sound processing control unit 42. It consists of terminals.

  The signal output terminal 49 is for outputting a sound signal to another sound input / output device 2, and is connected to a plurality of terminals connected to the output terminal 25 of each sound device 1 via the input sound processing control unit 43. Become.

  The control signal terminal 50 is for connecting between the main control units 44 of the respective sound input / output devices 2 in order to exchange information with another sound input / output device 2.

  FIG. 5 is an example of a front view of the sound input / output device. As shown in FIG. 5, the acoustic input / output device 2 is configured by arranging a plurality of planar capacitor type devices 11 of the acoustic device 1 adjacent to each other in a panel shape. FIG. 5 shows, as an example, a panel-like acoustic input / output device 2 in which a total of 55 planar capacitor type devices 11 of 5 vertically and 11 horizontally are arranged in a matrix. Further, FIG. 5 shows a state in which the planar capacitor type device 11 operated as a microphone is hatched, and light is emitted to indicate that the light emitting unit 27 in the vicinity functions as a microphone. .

  The sound input / output device 2 is preferably configured as a wall-mounted device such as a whiteboard, or as a self-supporting device such as a whiteboard.

  The number and shape of the acoustic devices 1 of the acoustic input / output device 2 are not limited to those shown in the figure.

  The acoustic input / output device 2 uses each acoustic device 1 as a microphone or a speaker based on the position information of the speaker or listener input from the operation unit 46 or information sent from another acoustic input / output device 2. Can be set individually to work. In addition, the acoustic input / output device 2 can be set so that the acoustic devices 1 in which the plurality of acoustic devices 1 are arranged in a matrix as described above are grouped for each column, for example, and operate as a microphone or a speaker for each group. .

  Further, as shown in FIG. 5B, when each acoustic device 1 constituting the acoustic input / output device 2 is used as a microphone or a speaker for each column, the light emitting unit 27 is not provided in each acoustic device 1. In addition, a light emitting unit 27 is provided above and below the acoustic input / output device 2 to display whether or not each acoustic device 1 functions as a microphone and the sound volume of sound waves collected when functioning as a microphone by light emission. It can also be configured.

  Further, as shown in FIG. 5 (B), for each acoustic device 1 of the acoustic input / output device 2, the one used as a microphone and the one used as a speaker are alternately arranged and temporarily arranged. Alternatively, it may be used continuously or fixed.

  In the acoustic input / output device 2, when the operation of some of the planar capacitor type devices 11 (acoustic device 1) is stopped, the power of the acoustic device 1 is turned off and the light emitting unit 27 does not emit light. It can be determined that the microphone is not operating.

  FIG. 6 is a configuration diagram of a remote conference system using two sound input / output devices. Here, when the remote conference system 3 is configured by two acoustic input / output devices 2, the signal input terminal 48 of one acoustic input / output device 2 (referred to as acoustic input / output device 2a) and the other acoustic input / output device 2 are used. A signal output terminal 49 of the input / output device 2 (referred to as an acoustic input / output device 2b) is connected, and a signal output terminal 49 of the acoustic input / output device 2a is connected to a signal input terminal 48 of the acoustic input / output device 2b. Further, the control signal terminal 50 of the acoustic input / output device 2a is connected to the control signal terminal 50 of the acoustic input / output device 2b. Any connection between the two sound input / output devices 2a and 2b can be used as long as it can transmit and receive signals such as an audio cable, a local area network, a telephone line, the Internet, radio communication, and infrared communication. May be used. In addition, depending on the usage mode of the remote conference system, by connecting the signal input terminal 48 and the signal output terminal 49 of the sound input / output device 2 with one or more cables, monaural sound, stereo sound, Any of multi-channel audio can be exchanged.

  FIG. 7 is a diagram illustrating a control example of microphone arrangement at the time of speaker detection. In the remote conference system 3, when the position of the speaker with respect to the sound input / output device 2 is determined in advance, or when the sound input / output device 2 detects the voice of the speaker with the sound device 1 operating as a microphone, The sound device 1 near the position where the sound is detected can be set to operate as a microphone, and the other sound devices 1 can be set to operate as a speaker.

  For example, when the speaker a is fixed to speak in the remote conference, the main control unit 44 of the sound input / output device 2 outputs a control signal to the switching control unit 41, and FIG. As shown in FIG. 2, the sound device 1 near the position of the speaker a is operated as a microphone, and the other sound device 1 is operated as a speaker.

  When the speaker is not fixed to the speaker a in the remote conference, the sound input / output device 2 detects the speaker as follows. That is, the main control unit 44 outputs a control signal to the switching control unit 41, and operates all of the one stage of the panel-like acoustic device 1 arranged in a matrix as a microphone. When the main controller 44 of the acoustic input / output device 2 detects that one of the planar capacitor devices 11 of the acoustic device 1 operating as a microphone detects that the speaker a has started speaking at a certain timing, the switching controller A control signal is output to 41, and as shown in FIG. 7A, the acoustic devices 1 near the position of the speaker a (the acoustic devices 1 for three rows in the figure) are operated as microphones, and the other acoustics The apparatus 1 is switched to operate as a speaker. As a result, the voice of the speaker can be reliably and efficiently collected.

  Further, as shown in FIG. 7B, in the acoustic input / output device 2, the position of the speaker can be detected by the human sensor 45. That is, since the human sensor 45 detects which planar capacitor type device 11 of the acoustic input / output device 2 is in front of the speaker, the acoustic device 1 in front of the speaker is set to function as a microphone. be able to.

  In the acoustic input / output device 2, a person in front of the acoustic input / output device 2 is detected by the human sensor 45, and a speaker is detected by operating the planar capacitor type device 11 for one stage as a microphone. It is also possible to set as follows. Thereby, the detection accuracy of a speaker can be improved.

  Next, a process in which the sound input / output device 2 detects a speaker and switches the operation of the sound device 1 will be described based on a flowchart. FIG. 8 is a flowchart for explaining the operation of the sound input / output device 2.

  In the sound input / output device 2, when the human sensor 45 is set to detect the position of the speaker, the main control unit 44 outputs a signal output from the human sensor 45 according to the speaker position. Is detected (s1), the capacitor type device 11 (acoustic apparatus 1) to be operated as a microphone is determined based on this signal (s2). Then, a control signal for switching the operation of the acoustic device 1 is output to the switching control unit 41, and the planar capacitor type device 11 (acoustic device 1) in front of the speaker is operated as a microphone (s3). When the acoustic device 1 starts operating as a microphone, the light emitting element 28 of the light emitting unit 27 starts emitting light (s4). Further, since the acoustic device 1 outputs a signal corresponding to the volume of the sound wave collected by the planar capacitor device 11 to the light emission control circuit 26 (s5), the light emission control circuit 26 responds to this signal by the light emitting unit 27. The quantity of the light emitting elements 28 that emit light is controlled (s6). As a result, the quantity of light emitted from the light emitting element 28 of the light emitting unit 27 changes according to the volume of the sound wave collected by the planar capacitor type device 11.

  When the main controller 44 of the sound input / output device 2 detects from the signal output from the human sensor 45 that the speaker has moved and its position has changed (s7), the processing after step s1 is performed. Execute. On the other hand, if the speaker is not moving, the processes in steps s5 to s7 are repeated.

  As described above, in the acoustic input / output device 2, the planar capacitor type device 11 is set to operate as a microphone or a speaker so that the microphone and the speaker are optimally arranged according to the positions of the speaker and the listener. The Therefore, according to the present invention, the number of microphones and speakers can be easily changed according to the positions of speakers and listeners attending the conference, and voice collection is performed according to the usage status of the acoustic input / output device 2. Since sound and sound emission can be set to an appropriate state, it is possible to simplify the conference room setting work before a remote conference is performed.

  In addition, in the above description, although the case where LED was used as the light emitting element 28 of the light emission part 27 was demonstrated, this invention is not restricted to this, For example, it replaces with LED and responds to signals, such as a light bulb and a plasma element. Other light emitting means may be used as long as they emit light.

1 is a schematic configuration diagram of an audio device according to an embodiment of the present invention. It is a block diagram which shows schematic structure of an audio equipment. It is an external view of an acoustic device. It is the block diagram which showed schematic structure of the acoustic input / output device. It is an example of the front view of an acoustic input / output device. It is a block diagram of the remote conference system by two sound input / output devices. It is a figure which shows the example of control of microphone arrangement | positioning at the time of speaker detection. 3 is a flowchart for explaining the operation of the sound input / output device 2.

Explanation of symbols

1-acoustic device 2, 2a, 2b-acoustic input / output device 3-remote conference system 11-planar capacitor type device 12-fixed electrode 13-fixed electrode 14-diaphragm 20-input terminal 21-power amplifier 22, 24-bias Power source 23-Differential amplifier 25-Output terminal 26-Light emission control circuit 27-Light emitting unit 28-Light emitting element 34-Switcher 41-Switching control unit 42-Output audio processing control unit 43-Input audio processing control unit 44-Main control 45-Human sensor 46-Operation unit 47-Storage unit

Claims (3)

An audio input / output device capable of collecting or emitting sound waves;
A sound output signal that is connected to the voice input / output device via a changeover switch, amplifies an input signal, outputs the amplified signal to the voice input / output device, and emits a sound wave corresponding to the input signal from the voice input / output device. Amplifying means;
A sound collection signal amplifying means connected to the sound input / output device via a changeover switch and amplifying an output signal corresponding to the sound wave collected by the sound input / output device;
Including the change-over switch and switching the change-over switch to connect the sound input / output device and the sound emission signal amplifying means to operate as a speaker that emits sound waves from the sound input / output device; Connection switching means for connecting the input / output device and the sound collection signal amplification means, and operating the sound input / output device as a microphone for collecting sound waves;
Including a plurality of acoustic devices having voice input / output devices arranged in a matrix,
Control means for individually outputting a control signal to connection switching means of each acoustic device in order to operate each of the voice input / output devices as a microphone or a speaker;
A light emitting means disposed in the vicinity of the voice input / output device and emitting light when the voice input / output device is operated as a microphone;
A sound input / output device.   The acoustic input / output device according to claim 1, wherein the light emitting means includes a plurality of light emitters, and the number of light emitters that emit light changes in accordance with a volume of a sound wave propagated from outside.   The acoustic input / output device according to claim 1, wherein the light emitting means includes a light emitter whose emission color changes in accordance with a volume of a sound wave propagated from the outside.

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