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JP2006121202

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DESCRIPTION JP2006121202
PROBLEM TO BE SOLVED: To provide a sound input / output device capable of changing the
number of microphones and speakers according to the position of a speaker or a listener present
in front of the device and grasping which microphones can be used. SOLUTION: A sound input /
output device 2 arranges a plurality of flat condenser type devices 11 in a matrix, and operates
each flat condenser type device 11 as either a speaker or a microphone to collect and emit sound
waves. Make a sound. Further, the sound input / output device 2 changes the number and
arrangement of the flat capacitor type devices 11 operated as a speaker or a microphone
according to the position of the speaker or the listener. Furthermore, the light emitting unit 27
provided in the vicinity of each flat capacitor type device 11 emits light when the flat capacitor
type device 11 is operated as a microphone, and the light emitting element 28 emits light
according to the volume of the sound wave collected by the flat capacitor type device 11. The
number of light emitting elements 28 and the number of light emitting elements 28 change.
[Selected figure] Figure 5
Sound input / output device
[0001]
The present invention relates to an audio input / output device that can switch and operate a
plurality of audio input / output devices individually as a speaker or a microphone.
[0002]
Various teleconferencing systems have been proposed for performing teleconferencing by
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connecting so as to exchange audio and video between remote conference rooms.
In the teleconferencing system, a microphone is provided in each of the conference rooms for
collecting the speech of the meeting attendees, and a speaker for emitting the audio collected in
the other conference room. The microphones and speakers are installed in the following
manners: a microphone for each attendee, a microphone for the entire conference room, a
speaker or an earphone for each attendee, a speaker for the entire conference room Various
forms can be considered.
[0003]
Among them, in the configuration in which microphones for each attendee are provided,
conventionally, one or more speakers are shared by a plurality of attendees without providing a
speaker for each attendee. For this reason, there is a problem that the sense of reality is not high
because the speaker who is shown on the display and the voice of the speaker come from
different positions.
[0004]
Therefore, in response to such a problem, a teleconferencing information transmitting apparatus
and an information receiving apparatus capable of realizing a teleconferencing full of sense of
reality using a single audio channel while providing a microphone and a speaker for each
meeting attendee are disclosed. (See, for example, Patent Document 1). JP 07-58859 A
[0005]
In the conventional teleconferencing system, multiple microphones and speakers must be
prepared according to the number of conference attendees, and wiring must be performed
according to the seat arrangement, and the number of conference attendees has changed. In this
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 the remote
conference.
[0006]
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Further, even during the teleconference, there may occur a situation where the microphone
needs to be intensive or a situation where the speakers are intensive.
However, in this case, the number of microphones and speakers can not be changed because the
user is in a meeting, and the voice of the speaker (speaker) can not be emitted to all the listeners.
Sometimes the (speaker) voices can not be collected well, resulting in a conference lacking in
realism.
[0007]
Even when multiple microphones are prepared, it may not be possible to use all the microphones,
and it is difficult for the speaker to know which microphones can be used. At that time, if the
microphone was not usable, the voice of the speaker could not be collected.
[0008]
Therefore, the present invention is very easy to set up, can easily change the number of
microphones and speakers according to the position of the speaker or listener in front of the
device, and which microphone can be used It is an object of the present invention to provide an
audio input / output device that can easily grasp the
[0009]
The present invention has the following configuration as means for solving the above-mentioned
problems.
[0010]
(1) An audio input / output device capable of collecting a sound wave or emitting a sound wave,
connected to the audio input / output device via a changeover switch, amplifying an input signal
and outputting it to the audio input / output device Sound emission signal amplification means
for emitting a sound wave according to the input signal from the sound input / output device;
sound wave connected to the sound input / output device via a changeover switch; Sound
collection signal amplification means for amplifying and outputting the corresponding output
signal; and the changeover switch, wherein the changeover switch is switched to connect the
sound input / output device and the sound emission signal amplification means; It is operated as
a speaker for emitting a sound wave from an output device, or the sound input / output device
and the collected sound signal amplification means are connected, and a sound wave is
transmitted to the sound input / output device A plurality of audio devices having connection
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switching means operated as microphones for collecting sound, wherein the audio input and
output devices of each audio device are arranged in a matrix, and each audio input and output
device is operated as a microphone or a speaker; Control means for individually outputting a
control signal to connection switching means of each of the sound devices; 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 characterized by having.
[0011]
In this configuration, the plurality of audio input / output devices are arranged in a matrix, and
the switch is switched by the control signal output from the control unit to the connection
switching unit of each audio device, and the audio input / output device is a speaker Or act 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 audio input / output device, only the light emitting means provided in the
vicinity of the audio input / output device operated as a microphone emits light, so it can be
easily determined which audio input / output device is operating as a microphone.
Further, since the operation of the audio input / output device can be easily switched, the audio
input / output device operated as a microphone and the speaker are operated according to the
environment where the audio input / output device is installed and the state at that time. The
number and arrangement of voice input / output devices can be changed.
[0012]
(2) The light emitting means includes a plurality of light emitters, and the number of light
emitters to emit light changes according to the volume of the sound wave propagated from the
outside.
[0013]
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In this configuration, the plurality of light emitters of the light emitting means are configured
such that the quantity of light emission changes according to the intensity of the sound wave
propagated from the outside.
Therefore, it is possible not only to determine which audio input / output device is operating as a
microphone, but also to grasp the volume of the sound wave collected by the audio input /
output device according to the quantity emitted by the light emitter of the light emitting means.
Can.
In addition, when the speaker speaks toward the sound input / output device, it is possible to
adjust the amount of voice while checking the light emitting means.
[0014]
(3) The light emitting means is characterized by comprising a light emitting body whose light
emission color changes in accordance with the volume of the sound wave propagated from the
outside.
[0015]
In this configuration, the light emitting body of the light emitting means is configured to change
the light emission color according to the intensity of the sound wave propagated from the
outside.
Therefore, it is possible not only to determine which sound input / output device is operating as
a microphone, but also to grasp the volume of the sound wave according to the color of light
emitted from the light emitter of the light emitting means.
[0016]
According to the present invention, a plurality of voice input / output devices of the sound device
can be arranged in a matrix, and connection of each sound device can be switched to use the
voice input / output device as a microphone or a speaker. The number and arrangement of the
units can be easily changed in accordance with the position and use form of the speaker or the
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listener, and the function can be efficiently performed according to the purpose. Also, since 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, which voice input / output device is
functioning as a microphone as the speaker Can be easily grasped. In addition, the volume of the
collected sound waves can be easily grasped by changing the quantity or the emission color of
the light emitters to emit light according to the sound volume of the sound waves collected by
the sound input / output device.
[0017]
The sound input / output device of the present invention arranges a plurality of sound input /
output devices in a matrix and operates each sound input / output device as either a speaker or a
microphone to collect and emit sound waves. be able to. Also, the sound input / output device
can change the number and arrangement of voice input / output devices (sound devices)
operated as a speaker or a microphone according to the position of the speaker or the listener.
[0018]
Further, light emitting means are 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, the voice input / output device operating as a microphone
can be easily recognized. In addition, the light emitting means changes the color of the light
emitter or the number of light emission of the light emitter according to the volume of the sound
wave collected by the voice input / output device. You can check if it is.
[0019]
As a sound input / output device used for the sound 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 by switchably connecting the
sound emission signal amplification means and the sound collection signal amplification means
to the speaker, it operates as both a speaker and a microphone It can be done. In the following
description, the case of using a flat capacitor type device generally used as a capacitor type
speaker as an audio input / output device will be described as an example.
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[0020]
Hereinafter, the details of the present invention will be described. FIG. 1 is a schematic
configuration view of an acoustic device according to an embodiment of the present invention, in
which (A) is a cross-sectional view showing a schematic configuration of a flat capacitor type
device, and (B) is a case where the flat capacitor type device is used as a speaker And (C) is a
circuit diagram in the case of using a planar capacitor type device as a microphone. As shown in
FIG. 1A, the flat capacitor type device 11 is made of a conductive thin film having no air
permeability between two mesh-processed flat plate-like fixed electrodes (positive electrode,
negative electrode) 12 and 13. The flat diaphragm 14 is disposed to face the fixed electrodes 12
and 13.
[0021]
As shown in FIG. 1B, when the planar capacitor type device 11 is operated and used as a speaker,
an amplifier (power amplifier) 21 and a bias power supply 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 inversion voltage
amplifier 21N. The positive and negative of the phase are inverted and amplified, 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 supply 22 and vibrates due to the attractive force / repulsive force generated according to
the potential difference between the fixed electrodes 12 and 13 to generate air vibration that
becomes a sound wave.
[0022]
As shown in FIG. 1C, when the planar capacitor type device 11 is operated and used as a
microphone, a differential amplifier 23 and a bias power supply 24 are connected to the planar
capacitor type 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-inverted
input terminal of the differential amplifier 23. Further, a bias voltage is applied to the diaphragm
14 from the bias power supply 24. The diaphragm 14 and the fixed electrodes 12 and 13 are
electrostatically coupled, and the fixed electrodes 12 and 13 have capacitances according to the
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distance from the diaphragm 14 by the bias voltage applied to the diaphragm 14. Is occurring.
When an audio wave propagates from the outside, the diaphragm 14 is vibrated by the audio
wave, and the distance between the diaphragm 14 and the fixed electrodes 12 and 13 changes
due to this vibration, so the capacitance generated in the fixed electrodes 12 and 13 is A minute
current is generated due to the change, and by amplifying the signal voltage obtained by the
minute current flowing through the resistance element of high resistance value by the differential
amplifier, the propagated voice wave can be extracted as a voice signal. .
[0023]
The bias voltage applied to the diaphragm 14 may be set to different values in the case of
operating as a microphone and in the case of operating as a speaker. For example, it is preferable
to set the bias voltage when operating and using as a speaker to a value larger in absolute value
than the bias voltage when operating and using as a microphone.
[0024]
Next, switching between the case where the planar capacitor type device is operated as a
microphone and the case where it is used as a speaker and the case where the device is used as a
speaker is described. In the acoustic device of the present invention, as described based on FIG.
1, the flat capacitor type device can be switched and used as a speaker or a microphone. Further,
in the acoustic device 1, switching of 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.
[0025]
FIG. 2 is a block diagram showing a schematic configuration of the acoustic device. As shown in
FIG. 2, the acoustic device 1 includes a planar capacitor type device 11, a power amplifier 21, a
bias power supply 22, a differential amplifier 23, a bias power supply 24, a light emission control
circuit 26, a light emitting unit 27, and a switch 34. ing. Further, the switch 34 is provided with
double throw switches 35 to 38 and a switch control terminal 39.
[0026]
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In the switch 35, the first terminal 35a is fixed to the output side of the noninverting voltage
amplifier 21P of the power amplifier 21, the second terminal 35b is fixed to the noninverting
input terminal of the differential amplifier 23, and the common terminal 35c is fixed to the
planar capacitor type device 11. The electrodes 12 are connected to each other. The switch 36
has a first terminal 36 a connected to the bias power supply 22, a second terminal 36 b
connected to the bias power supply 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 37a is the output
terminal of the inverted voltage amplifier 21N of the power amplifier 21, the second terminal
37b is the inverted input terminal of the differential amplifier 23, and the common terminal 37c
is the fixed electrode 13 of the planar capacitor type device 11. Are connected to each other.
Further, a resistor (not shown) is connected between the inverting input terminal and the noninverting input terminal of the differential amplifier 23 in order to suppress the influence of
radiation noise and the like. In the switch 38, the first terminal 38a is connected to the ground
GND, the second terminal 38b is connected to the power supply 40, and the common terminal
38c is connected to the light emission control circuit 26.
[0027]
In the switch 34, the switches 35 to 38 are set to perform the opening / closing operation
interlockingly in accordance 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
device 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.
[0028]
The light emission control circuit 26 is connected to the differential amplifier 23, the light
emitting unit 27, and the common terminal 38 c of 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
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microphone, the voltage of the power supply 40 is the second terminal 38 b of the switch 38.
Applied through. When the voltage is applied, the light emission control circuit 26 outputs a
signal to cause the light emitting unit 27 to emit light in order to indicate that the acoustic device
1 functions as a microphone.
[0029]
In addition, 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.
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 according to this signal.
[0030]
Next, details of the light emitting unit 27 will be described. FIG. 3 is an external view of the
acoustic device. The light emitting unit 27 includes a plurality of light emitting elements 28 as
shown in FIG. 3, and as the light emitting element 28, an LED that emits a plurality of colors is
used. In this case, when the acoustic device 1 is set to operate as a microphone, all the light
emitting elements 28 emit light (turn on) in the same color. Then, it is preferable that the light
emission colors of all the light emitting elements 28 be changed in accordance with the sound
volume of the sound wave collected by the flat condenser type device 11. For example, in the
case where a three-color LED capable of selectively emitting green, orange, and red is used as the
light emitting element 28, when the acoustic device 1 is set to operate as a microphone (during
silence), All the light emitting elements 28 of the light emitting unit 27 emit green light. Also,
orange light is emitted until the sound volume of the collected sound waves reaches a certain
level, and the luminance of the light emitting element 28 is changed according to the volume
level. Furthermore, when the volume exceeds a certain level, red is turned on, and the luminance
of the light emitting element 28 is changed according to the level of the volume.
[0031]
The light emitting unit 27 can also emit light in another pattern. For example, as the plurality of
light emitting elements 28 used for the light emitting unit 27, LEDs of one light emitting color
are used. In this case, when the acoustic device 1 is set to operate as a microphone, several light
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emitting elements 28 emit light (turn on). Then, like the level meter of the recorder, the number
of light emitting elements 28 to be emitted may be changed according to the volume of the
sound wave collected by the flat condenser type device 11. In the case of such a configuration,
the emission color of the light emitting element 28 to be lit when the volume is below a certain
level, and the emission color of the light emitting element 28 to be lit when the volume exceeds a
certain level, You should use different colors.
[0032]
As described above, it is possible to determine whether the acoustic device 1 is used as a
microphone or not by changing the emission color of the light emitting unit 27 or changing the
number of light emitting elements 28 to emit light. It is possible to confirm whether the sound
wave collected by is the proper volume.
[0033]
Next, the configuration of the sound 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 a main control A unit 44, a human sensor 45, an
operation unit 46, a storage unit 47, a signal input terminal 48, a signal output terminal 49, and
a control signal terminal 50 are provided.
[0034]
The switching control unit 41 is connected to the switching control terminal 39 of the switching
unit 34 in each audio device 1, outputs a control signal, and performs switching for using each
audio device 1 as a speaker or a microphone.
[0035]
The output sound processing control unit 42 is connected to the input terminal of each sound
device 1.
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The output sound processing control unit 42 corrects the frequency characteristic of the sound
emitted from the sound device 1 when the flat capacitor type device 11 which is the sound input
/ output device of the sound device 1 is used as a speaker. In addition, the output sound
processing control unit 42 adjusts the output gain of the sound emitted from the acoustic device
1 when the flat capacitor type device 11 is used as a speaker.
[0036]
The input voice processing control unit 43 is connected to the output terminal of each audio
device 1. When using the flat condenser type device 11 of the acoustic device 1 as a microphone,
the input speech processing control unit 43 corrects the frequency characteristic of the sound
collected by the acoustic device 1. Further, the input sound processing control unit 43 adjusts
the input gain of the sound collected by the acoustic device 1 when the flat capacitor type device
11 is used as a microphone.
[0037]
The main control unit 44 outputs control signals to the switching control unit 41, the output
sound processing control unit 42, and the input sound processing control unit 43 to control the
operations of these units.
[0038]
The human sensor 45 determines the presence or absence of a speaker or a listener at the front
of each sound device 1 of the sound input / output device 2.
As the human sensor 45, for example, a photoelectric sensor or an infrared sensor is preferable.
[0039]
The operation unit 46 is used to input position information of a speaker or a listener, and to set a
use mode in accordance with the use mode of the sound input / output device 2.
[0040]
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The storage unit 47 corresponds to an arrangement pattern of the flat capacitor type device 11
operated as a microphone, an arrangement pattern of the flat capacitor type device 11 operated
as a speaker, and a correspondence corresponding to an arrangement pattern selected by
another sound input / output device 2. One or more arrangement patterns are stored.
[0041]
The signal input terminal 48 is for inputting an audio signal output from another acoustic input /
output device 2, and a plurality of the signal input terminals 48 are connected to the input
terminal 20 of each audio device 1 through the output audio processing control unit 42. It
consists of the terminal of.
[0042]
The signal output terminal 49 is for outputting an audio signal to another sound input / output
device 2, and from a plurality of terminals connected to the output terminal 25 of each sound
device 1 via the input sound processing control unit 43. Become.
[0043]
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.
[0044]
FIG. 5 is an example of a front view of the sound input / output device.
As shown in FIG. 5, the sound input / output device 2 is configured by arranging a plurality of
flat capacitor type devices 11 of the sound device 1 adjacently in a panel shape.
FIG. 5 shows a panel-like acoustic input / output device 2 in which a total of 55 planar capacitortype devices 11 in a total of 55 sheets in total of 5 in length and 11 in width are arranged as an
example.
Further, FIG. 5 illustrates hatching of the flat condenser type device 11 operated as a microphone
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and light emission to indicate that the light emitting unit 27 in the vicinity thereof functions as a
microphone. .
[0045]
The sound input / output device 2 is preferably configured as a wall-mounted device, such as a
whiteboard, or configured as a self-standing device, such as a whiteboard.
[0046]
The number and shape of the sound devices 1 of the sound input / output device 2 are not
limited to those shown in the figure.
[0047]
The sound input / output device 2 uses each sound device 1 as a microphone or a speaker based
on position information of a speaker or a listener input from the operation unit 46 or information
sent from another sound input / output device 2. It can be individually configured to operate.
The sound input / output device 2 can also be set to operate as a microphone or a speaker for
each group by grouping the sound devices 1 in which a plurality of sound devices 1 are arranged
in a matrix as described above, for example, for each row. .
[0048]
Moreover, as shown to FIG. 5 (B), when using each acoustic device 1 which comprises the
acoustic input / output device 2 as a microphone or a speaker for every row ¦ line ¦ column, the
light emission part 27 is not provided in each acoustic device 1. The light emitting units 27 are
provided on the upper and lower sides of the sound input / output device 2 to indicate whether
each sound device 1 functions as a microphone and the volume of sound waves collected when
functioning as a microphone by light emission. It can also be configured.
[0049]
Further, as shown in FIG. 5 (B), for each sound device 1 of the sound input / output device 2, one
to be used as a microphone and one to be used as a speaker are alternately arranged, and the
arrangement is temporary. Alternatively, it may be fixed and used continuously.
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[0050]
In the sound input / output device 2, when the operation of part of the flat capacitor type device
11 (sound device 1) is stopped, the power of the sound device 1 is turned off, so the light
emitting unit 27 does not emit light. , It can be determined that it is not operating as a
microphone.
[0051]
FIG. 6 is a block diagram of a teleconference system using two sound input / output devices.
Here, when the teleconference system 3 is configured by two sound input / output devices 2, one
sound input / output device 2 (referred to as a sound input / output device 2a).
And the other sound input / output device 2 (referred to as a sound input / output device 2b).
And the signal output terminal 49 of the audio input / output device 2a and the signal input
terminal 48 of the audio input / output device 2b.
Further, the control signal terminal 50 of the sound input / output device 2a and the control
signal terminal 50 of the sound input / output device 2b are connected.
For the connection between the two sound input / output devices 2a and 2b, any one can be used
to transmit and receive signals such as an audio cable, a local area network, a telephone line, the
Internet, radio wave communication, infrared communication, etc. You may use it.
In addition, depending on the use form of the teleconference system, monaural sound, stereo
sound, etc. can be connected by connecting between the signal input terminal 48 and the signal
output terminal 49 of the sound input / output device 2 with one or more cables. It can exchange
any of multi-channel audio.
[0052]
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15
FIG. 7 is a diagram showing an example of control of microphone arrangement at the time of
speaker detection. In the teleconference 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 of the speaker
is detected by the sound device 1 operating as the microphone, The sound device 1 near the
position where the voice is detected can be set to operate as a microphone, and the other sound
devices 1 can be set to operate as a speaker.
[0053]
For example, when it is fixed to the speaker a to speak in a remote conference, the main control
unit 44 of the sound input / output device 2 outputs a control signal to the switching control unit
41, as shown in FIG. As shown in FIG. 5, the sound device 1 near the position of the speaker a
operates as a microphone, and the other sound device 1 operates as a speaker.
[0054]
Further, 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 one step of the panel-like acoustic device 1 arranged in a matrix as a microphone. Then,
when the main control unit 44 of the sound input / output device 2 detects that one of the flat
capacitor type devices 11 of the acoustic device 1 that operates as a microphone detects that the
speaker a has started speaking at a certain timing, the switching control unit The control signal is
output to 41, and as shown in FIG. 7A, the sound device 1 (the sound device 1 for three lines in
the figure) in the vicinity of the position of the speaker a is operated as a microphone. Switch the
device 1 to operate as a speaker. As a result, the voice of the speaker can be collected reliably
and efficiently.
[0055]
Further, as shown in FIG. 7B, in the sound input / output device 2, the position of the speaker can
also 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,
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the acoustic device 1 in front of the speaker is set to function as a microphone. be able to.
[0056]
Further, in the sound input / output device 2, the human sensor 45 detects a person in front of
the sound input / output device 2 and operates the one-stage flat capacitor type device 11 as a
microphone to detect a speaker. It is also possible to set as follows. Thereby, the detection
accuracy of the speaker can be improved.
[0057]
Next, processing 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.
[0058]
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 in
accordance with the position of the speaker. Is detected (s1), a capacitor type device 11 (sound
device 1) to be operated as a microphone is determined based on this signal (s2). Then, a control
signal for switching the operation of the audio device 1 is output to the switching control unit 41,
and the flat condenser type device 11 (audio 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 light emission (s4). Further, in the acoustic device
1, since the signal corresponding to the volume of the sound wave collected by the flat capacitor
type device 11 is output to the light emission control circuit 26 (s5), the light emission control
circuit 26 responds to this signal. The number of light emitting elements 28 that emit light is
controlled (s6). As a result, the quantity of light emitted by the light emitting elements 28 of the
light emitting unit 27 changes in accordance with the volume of the sound wave collected by the
flat capacitor type device 11.
[0059]
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When the main control unit 44 of the sound input / output device 2 detects that the speaker has
moved and its position has been changed by the signal output from the human sensor 45 (s7),
the processing after step s1 is performed. Run. On the other hand, when the speaker is not
moving, the processes of steps s5 to s7 are continuously repeated.
[0060]
As described above, in the sound 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 position of the speaker or the listener. Ru. Therefore,
according to the present invention, it is possible to easily change the number of microphones and
speakers according to the position of the speaker or listener who is present at the meeting, and
the voice collection is made according to the use situation of the sound input / output device 2
Since the sound and the sound emission can be set to the appropriate state, the setting work of
the conference room before the remote conference can be simplified.
[0061]
In the above description, although the case where an LED is used as the light emitting element 28
of the light emitting unit 27 has been described, the present invention is not limited to this. Other
light emitting means may be used as long as it emits light.
[0062]
It is a schematic block diagram of the acoustic device concerning the embodiment of the present
invention.
It is a block diagram which shows schematic structure of an acoustic apparatus. It is an outline
view of an acoustic device. It is the block diagram which showed schematic structure of the
sound input / output device. It is an example of the front view of a sound input output device. It
is a block diagram of the teleconference 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. 5 is a flowchart for explaining the operation of the sound input / output
device 2;
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Explanation of sign
[0063]
1-Acoustic device 2, 2a, 2b-Acoustic input / output device 3- Teleconferencing system 11-Planar
capacitor type device 12-Fixed electrode 13-Fixed electrode 14-Vibrating plate 20-Input terminal
21-Power amplifier 22, 24 bias Power supply 23-differential amplifier 25-output terminal 26light emission control circuit 27-light emitting unit 28-light emitting element 34-switch 41switching control unit 42-output sound processing control unit 43-input sound processing
control unit 44-main control Unit 45-Human sensor 46-Operation unit 47-Memory unit
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