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DESCRIPTION JP2010028163

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DESCRIPTION JP2010028163
PROBLEM TO BE SOLVED: To provide an acoustic device capable of realizing various sound
emission and reception modes according to the number of acoustic units capable of wireless
communication. SOLUTION: An acoustic device has one or more acoustic units 1. The acoustic
unit 1 includes a plurality of sound emission and reception combining elements MS1 to MS4
functioning as a microphone or a speaker, and the other acoustic units 1 and the casing can be
mechanically connected to each other and can wirelessly communicate. For example, one sound
unit 1 functions as a sound emitting device or a sound collecting device based on an operation
input from a user. Further, in the case where the plurality of acoustic units 1 in wireless
communication are not mechanically connected to each other, each of the plurality of acoustic
units 1 functions as a sound emission and collection device and performs voice communication
with each other. Furthermore, when multiple enclosures are mechanically connected, a plurality
of acoustic units 1 in wireless communication form one collective acoustic unit 100 from a group
of acoustic units 1 as a sound emitting device. Function. [Selected figure] Figure 1
Sound equipment
[0001]
The present invention relates to an acoustic apparatus having an acoustic unit having a sound
emission and collection function, which realizes various sound emission and collection modes in
accordance with the number of communicable audio units.
[0002]
Conventionally, various acoustic devices have been proposed which realize various sound
emission and collection modes by connecting a plurality of acoustic units (see, for example,
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Patent Document 1).
[0003]
The sound system of Patent Document 1 realizes various sound emission directivity by
connecting a plurality of sound units having a plurality of speakers, or connects a plurality of
sound units having a plurality of microphones. It is possible to realize a sound collection
directivity.
JP, 2006-262416, A
[0004]
However, although the sound system of Patent Document 1 realizes various sound emission
directivity by connecting a plurality of sound units having a plurality of speakers, one sound unit
functions only as a mere speaker.
Similarly, although various sound collection directivity is realized by connecting a plurality of
sound units having a plurality of microphones, one sound unit functions only as a simple
microphone.
[0005]
Therefore, it is an object of the present invention to provide an audio apparatus that realizes
various sound emission and collection modes according to the number of audio units capable of
wireless communication.
[0006]
An audio apparatus according to the present invention is an audio apparatus having an audio
unit provided with a plurality of sound emission and reception elements functioning as a speaker
or a microphone, and the sound unit is a function of each of the plurality of emission and sound
emission elements. And the communication detection means for detecting the communicable
sound unit, wherein the sound emission and sound setting means is based on the number of
communicable sound units detected by the communication detection means. And setting
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functions of the plurality of sound emission and reception elements.
[0007]
In this configuration, the acoustic device has an acoustic unit including a plurality of sound
emission and reception elements functioning as a speaker or a microphone.
The sound unit detects a communicable sound unit, and sets functions of a plurality of sound
emission and sound combining elements based on the detected number of communicable sound
units.
Thereby, the acoustic device can realize various sound emission and reception modes according
to the number of communicable acoustic units.
[0008]
Further, when the sound emission and collection setting means of the sound device of the
present invention detects that there is no sound unit that can be communicated by the
communication detection means, all of the plurality of sound emission and sound combining
elements are used as speakers or microphones. It is characterized by having it function.
[0009]
In this configuration, the sound unit functions as a speaker array or a microphone array when
there is no communicable sound unit.
As a result, the sound device can realize various sound emission and reception modes even if
there is no communicable sound unit.
[0010]
Furthermore, when the sound emission and collection setting means of the sound device
according to the present invention detects a sound unit that can be communicated by the
communication detection means, a part of the plurality of sound emission and sound combining
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elements function as a speaker and the remaining sound emission The sound emission and
reception combining element functioning as a microphone and functioning as a speaker is
characterized in that the sound collection signal emitted by another sound unit is emitted.
[0011]
In this configuration, the sound unit functions as a sound emitting and collecting device when
there is a communicable sound unit.
Then, the sound unit emits the collected sound signal from the communicable sound unit. Thus,
the audio device can use these audio units as voice communication devices capable of
communicating with each other.
[0012]
In addition, the sound unit of the sound device according to the present invention controls the
sound collection directivity for the sound collection signal generated by the sound collection and
sound combining element functioning as a microphone among the plurality of sound collection
and sound collection combined elements Sound collection beam signal generation means for
generating a sound collection beam signal, and connection detection means for detecting
connection with another sound unit, the sound emission and sound setting means comprising a
plurality of connected sound It is characterized in that sound emission control is performed on
the unit group as one collective type acoustic unit.
[0013]
In this configuration, when the acoustic unit detects a connection with another acoustic unit, the
plurality of acoustic units connected are regarded as one collective acoustic unit to perform
sound emission control.
As a result, since the sound device can perform various sound emission control according to the
number of sound units to be connected, various sound emission modes can be realized.
[0014]
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According to the present invention, various sound emission and collection modes can be realized
according to the number of communicable sound units.
[0015]
An acoustic unit 1 according to an embodiment of the present invention will be described with
reference to FIG.
FIG. 1 is a block diagram showing the function and configuration of the acoustic unit. The
acoustic unit 1 includes a collective mode forming a collective acoustic unit 100 (see FIG. 4)
operating as a single acoustic unit with a plurality of acoustic units, and an individual mode each
operating as a single acoustic unit. Prepare. As shown in FIG. 1, the acoustic unit 1 includes an
operation unit 10, a connection detection unit 11, a communication control unit 12, a control
unit 13, a sound emission control unit 14, a switching unit 15, a sound collection control unit 16
and an echo cancellation unit 17. , And the sound emission and collection element MS1 to MS4.
[0016]
The operation unit 10 receives an operation input from the user and outputs an operation signal
to the control unit 13. For example, when operating alone, the operation unit 10 receives an
operation input specifying whether it functions as a sound emitting device or a sound collecting
device.
[0017]
The connection detection unit 11 detects whether or not it is mechanically connected to another
sound unit. The connection detection unit 11 outputs a connection detection signal based on the
detection result to the control unit 13. Hereinafter, the mechanical connection is referred to as a
mechanical connection.
[0018]
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The communication control unit 12 detects whether wireless communication with another
acoustic unit is possible. The communication control unit 12 outputs a communication detection
signal based on the detection result to the control unit 13. When the communication control unit
12 detects an audio unit capable of wireless communication, the communication control unit 12
controls, based on an instruction of the control unit 13, input / output of an audio signal, a
control signal, and the like to the audio unit.
[0019]
Further, the communication control unit 12 can be connected to another voice communication
device via a network or the like. The communication control unit 12 controls transmission and
reception of an audio signal, a control signal, and the like to the audio communication device
based on an instruction of the control unit 13.
[0020]
Further, the communication control unit 12 can be connected to a reproduction device such as
an audio player and a storage device such as a recording device such as an IC recorder. When the
communication control unit 12 is connected to the reproduction device or the storage device, the
communication control unit 12 controls input / output of an audio signal, a control signal, etc. to
the connected device based on an instruction of the control unit 13.
[0021]
The control unit 13 determines the mode based on the connection detection signal input from
the connection detection unit 11. The control unit 13 determines the collective mode when
mechanically connected with another acoustic unit, and determines the individual mode when
mechanically connected with another acoustic unit.
[0022]
In the collective mode, the control unit 13 determines the function of the collective acoustic unit
100 as the sound emitting and collecting function. Then, the control unit 13 determines the main
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unit by a method described later. The main unit is an acoustic unit that centrally controls the
plurality of acoustic units among the plurality of acoustic units constituting the collective
acoustic unit 100. Note that among the plurality of acoustic units constituting the collective
acoustic unit 100, the other acoustic units excluding the main unit are sub-units. The control unit
13 of the main unit calculates the relative positional relationship of each acoustic unit.
Specifically, for example, the relative positional relationship of all the sound units is calculated by
detecting the serial number of all the sound units and the adjacent relation of each sound unit.
The main unit controls the sound emission control unit 14 and the sound collection control unit
16 based on the calculated relative positional relationship. The details of the sound emission and
collection process in the collective mode will be described later.
[0023]
Further, in the individual mode, the control unit 13 outputs the function of its own device based
on the operation signal input from the operation unit 10 and the communication detection signal
input from the communication control unit 12; Decide on any of the sound collection function.
The method of determining the function of the own apparatus in the individual mode will be
described later.
[0024]
The control unit 13 controls the communication control unit 12, the switching unit 15, the sound
emission control unit 14, and the sound collection control unit 16 based on the determined mode
and function.
[0025]
The switching unit 15 switches, based on an instruction from the control unit 13, whether to
cause each of the sound emission and collection / use elements MS1 to MS4 to function as a
speaker or to function as a microphone.
The switching unit 15 causes all sound emitting and sound combining elements MS1 to MS4 to
function as speakers when the sound emitting function is determined, and causes all sound
emitting and sound combining elements MS1 to MS4 to be microphones when the sound
collecting function is determined. Make it work. Further, when it is determined that the sound
emitting and collecting function is selected, the switching unit 15 causes part of all the sound
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emitting and collecting elements MS1 to MS4 to function as a speaker, and causes the remaining
to function as a microphone.
[0026]
The sound emission control unit 14 performs a delay process or the like on the audio signal
input from the communication control unit 12 based on an instruction of the control unit 13.
Then, the sound emission control unit 14 supplies the sound signal after the delay processing to
the sound emission and sound combining elements MS1 to MS4 functioning as a speaker via the
switching unit 15.
[0027]
The sound emission and collection / use elements MS1 to MS4 are elements functioning as a
speaker and a microphone, and are arranged in an array. The sound emission and collection / use
elements MS <b> 1 to MS <b> 4 are connected to the sound emission control unit 14 and the
sound collection control unit 16 via the switching unit 15. The respective sound emitting and
collecting elements MS <b> 1 to MS <b> 4 emit the audio signal supplied from the sound emitting
control unit 14 when functioning as a speaker. Further, when functioning as a microphone, each
of the sound emission and collection / combination elements MS1 to MS4 collects surrounding
sound to generate a sound collection signal, and outputs the sound collection signal to the sound
collection control unit 16. The number of sound emitting and receiving elements is not limited to
four, and may be one or more. Further, the arrangement of the sound emission and collection /
use elements MS1 to MS4 may be equally spaced, or the center of the array may be dense and
the end of the array may be sparse.
[0028]
The sound collection control unit 16 performs delay processing and the like on the sound
collection signals input from the sound collection and collection elements MS1 to MS4, generates
a sound collection beam signal, and outputs the sound collection beam signal to the echo
cancellation unit 17.
[0029]
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The echo cancellation unit 17 includes an adaptive filter, generates a pseudo-regression sound
signal based on the sound emission sound signal, and performs a difference operation on the
sound collection beam signal from the sound collection control unit 16 to generate an echo.
Cancel
The echo cancellation unit 17 outputs the collected sound beam signal after the echo
cancellation to the communication control unit 12.
[0030]
Next, the operation of the acoustic unit 1 will be described for each mode. <Individual Mode>
First, a method of determining the function of the sound unit 1 in the individual mode will be
described with reference to FIG. FIG. 2 is a flowchart showing the process flow of the function
determination method in the individual mode.
[0031]
As shown in FIG. 2, when there is an audio unit capable of wireless communication (S101: Yes),
the control unit 13 of the audio unit 1 determines the function of the own device as the sound
emitting and collecting function (S102).
[0032]
When there is no sound unit capable of wireless communication (S101: No), the control unit 13
checks whether the function of the own device is set to the sound emission function (S103).
[0033]
When the control unit 13 is set to the sound emission function (S103: Yes), the control unit 13
determines that the function of the own device is the sound emission function (S104).
When the control unit 13 is not set to the sound emission function (S103: No), the control unit
13 determines the function of the own device as the sound collection function (S105).
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[0034]
As described above, in the individual mode, the sound unit 1 determines the function of the own
device based on the presence or absence of another sound unit capable of wireless
communication and the operation input from the user.
In addition, although the function was determined in advance by the user's operation input, the
function of the own device is determined as the sound emission function when the audio signal
input to the audio input terminal of the communication control unit 12 is not limited to this. If
the level is less than a predetermined level, the function of the device itself may be determined as
the sound collection function.
[0035]
Next, a usage example of the acoustic unit determined to be in the individual mode will be
described with reference to FIG. FIG. 3 is a view showing an example of use of the acoustic unit.
FIG. 3 (A) is an example used as a sound emitting device, FIG. 3 (B) is an example used as a sound
collecting device, and FIGS. 3 (C) and 3 (D) are examples used as a sound emitting device It is.
The sound units 1A to 1C in the figure have the same configuration as the sound unit 1 described
above.
[0036]
1) When Determined as the Sound Release Function As shown in FIG. 3A, the sound unit 1A is
connected to a reproduction device (not shown) such as an audio player via an audio cable. Then,
since the sound unit 1A is determined to have the sound emission function, the sound emission
and sound combining elements MS1 to MS4 are switched to the speakers. The sound unit 1A
emits the sound using the sound emission and reception combining elements MS1 to MS4 based
on the sound signal input from the reproduction device.
[0037]
2) When Determined as Sound Collection Function As shown in FIG. 3B, the acoustic unit 1A is
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connected to a recording device (not shown) such as an IC recorder via an audio cable. Then,
since the sound unit 1A is determined to have the sound collecting function, the sound emission
and sound combining elements MS1 to MS4 are switched to the microphones. The sound unit 1A
picks up the voice of the user 2A using the sound emission and collection / use elements MS1 to
MS4 and outputs the sound to the recording device. Further, for example, when the sound unit
1A is connected to a karaoke apparatus (not shown), the sound unit 1A picks up the singing voice
of the user 2A using the sound emission and collection element MS1 to MS4 and outputs it to the
karaoke apparatus.
[0038]
3) When determined to be the sound emitting and collecting function As shown in FIG. 3C, the
two sound units 1A and 1B are connected so as to be capable of wireless communication using
WiFi and other communication functions and the like. Then, since the sound units 1A and 1B are
determined to have the sound emitting and collecting function, for example, the sound emitting
and collecting elements MS2 and MS3 are switched to the microphones, and the remaining
sound emitting and collecting elements MS1 and MS4 are switched to the speakers. . The sound
unit 1A picks up the voice of the user 2A using the sound emission and collection element MS2
and MS3, generates a voice signal, and outputs the sound signal to the sound unit 1B in wireless
communication. Further, the sound unit 1A emits sound using the sound emission and collection
/ use elements MS1 and MS4 based on the sound signal inputted from the sound unit 1B in
wireless communication. Similarly, the sound unit 1B picks up the voice of the user 2B using the
sound emission and collection / combination element MS2 and MS3 to generate a voice signal,
and outputs the sound signal to the sound unit 1A in wireless communication. Further, the sound
unit 1B emits sound using the sound emitting and combining element MS1 and MS4 based on
the sound signal inputted from the sound unit 1A in wireless communication.
[0039]
Further, as shown in FIG. 3D, each of the three sound units 1A to 1C is connected to be wirelessly
communicable, and each is connected to a karaoke apparatus (not shown). Since the sound units
1A to 1C are determined to have the sound emitting and collecting function, for example, the
sound emitting and collecting elements MS2 and MS3 of the own device are switched to
microphones, and the remaining sound emitting and collecting elements MS1 and MS4 are
Switch to the speaker. The sound unit 1A emits the guide melody of the part of the user 2A using
the sound emitting and collecting elements MS1 and MS4, and collects the singing voice of the
user 2A using the sound emitting and collecting elements MS2 and MS3. Similarly, the sound unit
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1B emits the guide melody of the part of the user 2B using the sound emission and collection
combined elements MS1 and MS4, and collects the singing voice of the user 2b using the sound
emission and collection combined elements MS2 and MS3. Sound. Further, the acoustic unit 1C
emits the guide melody of the part of the user 2C using the emitting and collecting elements MS1
and MS4, and collects the singing voice of the user 2C using the emitting and collecting elements
MS2 and MS3. Do.
[0040]
As described above, in the individual mode, the sound unit 1 appropriately combines the sound
emission and sound generation by determining the number of the sound units 1 capable of
wireless communication according to various usage conditions such as one person use or
multiple person use. The elements MS1 to MS4 can be switched to realize the sound emitting
function, the sound collecting function, and the sound emitting function. As described above, in
the individual mode, the sound unit 1 can realize various sound emission and collection modes.
In addition, although it decided to the sound emission and collection function, the sound
emission and collection combined element MS2 and MS3 was switched to a microphone, and the
remaining sound emission and collection combined element MS1 and MS4 was switched to a
speaker, but it is not limited to this.
[0041]
<Assembly Type Mode> First, the function of the acoustic unit 1 in the collective mode will be
described with reference to FIG. FIG. 4 is a view showing an example of use of the collective
acoustic unit. As shown in FIG. 4, in the collective mode, the casings of two or more acoustic
units 1A to 1C are attached and mechanically connected to form a collective acoustic unit 100.
Then, the collective sound unit 100 functions as a sound emitting and collecting device. At this
time, each of the acoustic units 1A to 1C is capable of wireless communication, and performs
wireless communication to input / output an audio signal between the acoustic units 1A to 1C.
[0042]
Next, in the collective acoustic unit 100 shown in FIG. 4, the method of determining the main
unit will be described with reference to FIG. FIG. 5 is a flowchart showing the process flow of the
method of determining the main unit in the collective mode. The sound units 1A to 1C have the
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same configuration as the sound unit 1 described above.
[0043]
As shown in FIG. 5, the acoustic units 1A to 1C mutually notify each other of serial numbers for
identifying devices (S121). And sound unit 1A-1C determine an own apparatus as a main unit,
when the serial number of an own apparatus is larger than another sound unit (S122: Yes)
(S123). Further, when the serial numbers of the other sound units are larger than the serial
number of the own device (S122: No), the sound units 1A to 1C determine the own device as the
sub-unit (S124). As described above, the sound units 1A to 1C negotiate with other sound units
forming the collective sound unit 100 to determine the main unit. In addition, you may determine
not only the determination method of the main unit mentioned above but the sound unit first
named as a main unit as a main unit.
[0044]
Next, the flow of the sound emitting and collecting process of the collective acoustic unit 100
shown in FIG. 4 will be described with reference to FIG. 6 and FIG. FIG. 6 is a flowchart showing a
sound emission processing flow of the collective acoustic unit. FIG. 7 is a flow chart showing a
sound collection process flow of the collective sound unit. Actually, although the sound collecting
process and the sound emitting process are simultaneously performed, the sound collecting
process and the sound emitting process will be separately described for simplification of the
description. The following description is given assuming that the sound unit 1A is determined to
be the main unit 1A. Further, since the processes of the secondary units 1B and 1C are the same,
the secondary unit 1B will be described as an example.
[0045]
First, the sound emission processing of the collective acoustic unit 100 will be described. As
shown in FIG. 6, when the main unit 1A receives an audio signal from the device other than the
collective acoustic unit 100 including the own device via the network (S141), the main unit 1A
mechanically based on the relative positional relationship. A sound emission control signal for
instructing the sound emission control of each of the sound units 1A to 1C is generated so that
one sound emission beam signal is emitted by all the sound units 1A to 1C connected (S142). The
main unit 1A outputs the received voice signal and the generated sound emission control signal
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to the sub units 1B and 1C (S143). Then, based on the sound emission control signal, the main
unit 1A performs a delay process or the like for the sound signal on the sound signal (S144). The
main unit 1A supplies the sound signal subjected to the delay processing to the sound emission
and collection / use elements MS1A to MS4A to emit sound (S145).
[0046]
Also, when the audio signal and the sound emission control signal for the own device are input
from the main unit 1A (S151), the sub unit 1B delays the sound signal for the audio signal based
on the sound emission control signal. A process etc. are performed (S152). The sub-unit 1B
supplies the sound signal subjected to the delay processing to the sound emission and collection
/ use element MS1B to MS4B and emits sound (S153).
[0047]
As described above, the collective acoustic unit 100 includes all the acoustic units 1A to 1C
mechanically connected, and can emit one sound emission beam signal in the entire acoustic
units 1A to 1C.
[0048]
Next, sound collection processing of the collective acoustic unit 100 will be described.
As shown in FIG. 7, the main unit 1A generates a sound collection beam signal from the collected
sound (S161).
[0049]
On the other hand, the subsidiary unit 1B generates a collected sound beam signal from the
collected sound (S171), and outputs the collected sound beam signal to the main unit 1A (S172).
The sound collection beam signal of the sub unit 1B is output to the main unit 1A without being
subjected to echo cancellation processing by the echo cancellation unit 17.
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[0050]
When the sound collection beam signal is input from the sub-units 1B and 1C (S162), the main
unit 1A uses the sound collection beam signal generated by its own device and the sound
collection beam signal input from the sub-units 1B and 1C. The sound collection beam signal
having the highest signal level is selected (S163). The main unit 1A cancels the echo of the
selected sound collection beam signal in the echo cancellation unit 17 of its own device (S164),
and collects the sound collection beam signal from which the echo has been removed. And
transmit to another device (S165).
[0051]
As described above, main unit 1A selects the collected sound beam signal having the highest
signal level from the collected sound beam signal of main unit 1A and the collected sound beam
signals of sub units 1B and 1C, and removes the echo. , It transmits to the apparatus different
from the group type acoustic unit 100 in which an own apparatus is included. As a result, the
collective acoustic unit 100 selects the sound collection beam signal having the highest signal
level from the sound collection beam signals generated by each of the sound units 1A to 1C and
transmits it to the voice communication device of the voice communication destination. be able
to.
[0052]
As described above, in the collective mode, since the collective sound unit 100 is formed to
realize the sound emitting and collecting function, the total number of sound emitting and sound
combining elements is increased, so that highly accurate sound collecting control that is difficult
alone can be realized. can do.
[0053]
In the present embodiment, at the time of formation of the collective type acoustic unit 100, the
main unit 1A selects the sound collection beam signal having the highest signal level from the
sound collection beam signals generated by the respective sound units 1A to 1C. Sent.
However, the threshold level for output is set in advance, and the main unit 1A synthesizes only
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the sound collection beam signal equal to or higher than the threshold level from the sound
collection beam signals generated by the respective acoustic units 1A to 1C. It may be sent. Also,
the main unit 1A may simply combine and transmit the collected sound beam signals generated
by the acoustic units 1A to 1C.
[0054]
Further, in the present embodiment, at the time of formation of the collective acoustic unit 100,
the main unit 1A determines the radiation directivity of each of the acoustic units 1A to 1C based
on the relative positional relationship of all the acoustic units 1A to 1C, The sound emission
control signal of each acoustic unit 1A-1C was produced | generated. However, each of the sound
units 1A to 1C may individually calculate the relative positional relationship, and determine and
control the sound emission directivity of the own device based on the relative positional
relationship. Alternatively, the main unit 1A may generate in advance an audio signal to be
supplied to each of the sound emitting and combining elements MS1 to MS4 of all the acoustic
units 1A to 1C in the main unit 1A, and may output it to the sub unit.
[0055]
Furthermore, in the present embodiment, at the time of formation of the collective acoustic unit
100, each of the acoustic units 1A to 1C functions as a part of the sound emission and collection
combining element MS1A to MS4A, MS1B to MS4B, MS1C to MS4C of the own device as a
microphone. The rest was made to function as a speaker, and the sound was collected. However,
the sound units 1A and 1C may function as a sound output device, and the sound unit 1B may
function as a sound collection device to perform sound emission processing.
[0056]
In addition, in the present embodiment, the mechanical connection between the housings is the
mechanical connection, but the housings may be disposed adjacent to each other and the
connection by the audio cable or the like may be the mechanical connection. .
[0057]
It is a block diagram which shows the function and structure of an acoustic unit.
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It is a flowchart which shows the processing flow of the determination method of the function in
separate mode. It is a figure which shows the example of use of an acoustic unit. It is a figure
which shows the example of use of a collective type acoustic unit. It is a flowchart which shows
the processing flow of the determination method of the main unit in a collective type mode. It is a
flowchart which shows the sound emission processing flow of a collective type acoustic unit. It is
a flowchart which shows the sound collection process flow of a collective type acoustic unit.
Explanation of sign
[0058]
DESCRIPTION OF SYMBOLS 1 ... Acoustic unit, 2A-2C ... User, 10 ... Operation part, 11 ...
Connection detection part, 12 ... Communication control part, 13 ... Control part, 14 ... Sound
emission control part, 15 ... Switching part, 16 ... Sound collection control Unit 17 Echo
cancellation unit 100 Collective acoustic unit MS1 to MS4
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