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JP2009260585

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DESCRIPTION JP2009260585
The present invention provides an acoustic system capable of providing various acoustic
functions simply by replacing functional modules. A sound system 100 includes at least one or
more sound units 1 (1A to 1C) and one functional module 2. The sound unit 1 is a device that
functions as a sound emitting device, a sound collecting device, and a sound emitting device
according to the function of the functional module 2 to be connected. The functional module 2 is
an apparatus having an audio signal processing function and functioning by being connected to
the acoustic unit 1. When the acoustic unit 1B detects the connection with the functional module
2, it identifies the function of the functional module 2 and determines the acoustic function of
the acoustic units 1A to 1C according to the identification result. Further, the acoustic unit 1B
acquires the relative positional relationship of the acoustic units 1A to 1C, and determines the
function and the emitted sound directivity of the sound emitting and combining elements MS1 to
MS6 according to the relative positional relationship. [Selected figure] Figure 3
Sound system
[0001]
The present invention relates to an acoustic system comprising an acoustic unit having a
plurality of sound emitting and receiving elements functioning as a speaker or a microphone, and
a functional module having an audio signal processing function which functions by being
connected to the acoustic unit. About.
[0002]
Conventionally, various sound systems provided with a speaker array including a plurality of
speakers, a microphone array including a plurality of microphones, and the like have been
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proposed (Patent Document 1).
[0003]
In the sound system of Patent Document 1, a plurality of speaker units provided with a speaker
array consisting of a plurality of speakers are connected to control the plurality of speaker units
as one speaker array to realize a sound emitting function, and a plurality of microphones. A
sound collecting function is realized by connecting a plurality of microphone units provided with
a microphone array and controlling the plurality of microphone units as one microphone array.
JP, 2000-262416, A
[0004]
However, in the sound system of Patent Document 1, since it functions only as a sound emitting
device and a sound collecting device, it becomes necessary to separately prepare a sound
emitting device and a sound collecting device for each function required according to the
connection device. The
[0005]
Therefore, it is an object of the present invention to provide a sound system that functions as a
sound emission device, a sound collection device, and a sound emission device by automatically
detecting a required function according to the connection device.
[0006]
An acoustic system according to the present invention is an acoustic system including an
acoustic unit and a functional module, wherein the acoustic unit functions as a speaker or a
microphone, and a plurality of sound emission and sharing elements arranged in an array in a
housing And a sound collection means for determining whether to make the plurality of sound
collection and reception elements function as a speaker or a microphone, detection means for
detecting connection with the functional module, and the detection means detect connection
Identifying means for identifying the function of the selected functional module, wherein the
sound emission and collection determining means of the sound unit determines the functions of
the plurality of sound emission and collection elements according to the functions identified by
the identification means. It is characterized by
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[0007]
In this configuration, the acoustic system comprises an acoustic unit and a functional module.
In the acoustic unit, a plurality of sound emission and reception elements functioning as a
speaker or a microphone are arrayed and arranged in a housing.
The acoustic unit, upon detecting a connection with the functional module, identifies the function
of the functional module.
The sound unit determines whether the plurality of sound emission and reception elements
function as a microphone or function as a speaker according to the identification result.
Thereby, the sound system can function the sound unit as a sound emitting device, a sound
collecting device, or a sound emitting device according to the function of the functional module.
For this reason, the sound system can be equipped with various sound functions only by
replacing the function module, without replacing the sound unit.
[0008]
Further, a plurality of the acoustic units of the acoustic system of the present invention are
provided, and connection means for variably connecting relative positional relationships with
other acoustic units, and relativeness between the acoustic units connected with the connection
means The apparatus further comprises: measuring means for measuring the amount of
fluctuation; and voice control means for controlling the directivity of the sound emission signal
and the collected signal based on the amount of fluctuation measured by the measuring means.
[0009]
In this configuration, the acoustic system variably connects and arranges the relative positional
relationships of the plurality of acoustic units.
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The acoustic unit measures the relative variation between the acoustic units, and controls the
directivity of the sound emission signal and the collected signal based on the measured variation.
As a result, the sound system can set the sound emission directivity and the sound collection
directivity only by changing the relative positional relationship of the sound units.
[0010]
Furthermore, the connection means of the sound unit of the sound system of the present
invention is characterized in that it is rotatably connected to another sound unit.
[0011]
In this configuration, the acoustic system pivotally connects the plurality of acoustic units.
As a result, the sound emission directivity and the sound collection directivity can be set only by
rotating the sound unit.
[0012]
Further, each of the plurality of acoustic units of the acoustic system of the present invention is
set as a main unit or a sub unit, and the sound unit set as the main unit is a variation amount
measured by the measuring means of the own device and the sub unit The directivity of the
sound emission signal and the sound collection signal is determined based on the variation
amount measured by the measurement unit of the sound unit set as.
[0013]
In this configuration, the sound unit is set to the main unit or the sub unit.
The main unit determines the directivity of the sound emission signal and the sound collection
signal based on the variation between all the sound units. Thereby, the sound unit set to the main
unit can control the directivity of all the sound units.
[0014]
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According to the present invention, the sound system can be provided with various sound
functions simply by replacing the functional module without replacing the sound unit functioning
as a speaker or a microphone.
[0015]
An acoustic system 100 according to an embodiment of the present invention will be described
with reference to FIG.
FIG. 1 is a diagram showing an application example of an acoustic system. FIG. 1 (A) is an
example used as a recording device, FIG. 1 (B) is an example used as an audio conference device,
and FIG. 1 (C) is an example used as a playback device for audio signals. is there. Note that in the
sheet of FIG. 1, after each acoustic unit 1 is disposed on a straight line, the left direction toward
the sound collection surface of each acoustic unit 1 is referred to as L direction, and the sound
collection surface of each acoustic unit 1 The right direction toward is called the R direction.
[0016]
As shown in FIG. 1, the acoustic system 100 (100A to 100C) includes at least one or more
acoustic units 1 (1A to 1C) and one functional module 2. Each of the sound units 1A to 1C is a
device that functions as a sound emitting device, a sound collecting device, and a sound emitting
device according to the function of the functional module 2 to be connected. The functional
module 2 is an apparatus having an audio signal processing function and functioning by being
connected to the acoustic unit 1. The acoustic units 1A to 1C are connected by the connection
unit 3.
[0017]
For example, as shown in FIG. 1A, when connected to a functional module 2A having a recording
function, the acoustic unit 1 functions as a sound collection device. Thus, the sound system 100A
can be used as a recording device. Further, as shown in FIG. 1 (B), the sound unit 1 functions as a
sound emitting and collecting device when connected to the functional module 2B provided with
the audio conference function. Thus, the audio system 100B can be used as an audio conference
device. Furthermore, as shown in FIG. 1C, the sound unit 1 functions as a sound emitting device
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when connected to a functional module 2C having an external input function of an audio file.
Thus, the sound system 100C can be used as a reproduction device of an audio signal. As
described above, the sound system 100 can be used as a device having various sound functions
by replacing the functional module 2 without replacing the sound unit 1. The sound function is a
generic term for the sound emitting function, the sound collecting function, and the sound
emitting and collecting function.
[0018]
Next, the function and configuration of the sound system 100 will be described with reference to
FIGS. FIG. 2 is a block diagram showing the function and configuration of the sound system. FIG.
3 shows an example of a relative positional relationship database. FIG. 4 shows an example of the
function switching database. FIG. 5 shows an example of the sound emission and collection
database.
[0019]
As shown in FIG. 2, the sound units 1 (1A to 1C) include a communication control unit 10, a
control unit 11, a storage unit 12, an audio signal processing unit 13, a switching unit 14, and
sound emitting and combining elements MS1 to MS6. Prepare. Hereinafter, in order to simplify
the description, the acoustic unit 1B connected to the functional module 2 is referred to as a
main unit 1B, and the acoustic units 1A and 1C not connected to the functional module 2 are
referred to as sub-units 1A and 1C. The acoustic unit 1 connected to the functional module 2
may be disposed anywhere, for example, the acoustic unit 1A disposed at the end in the L
direction may be connected to the functional module 2.
[0020]
The communication control unit 10 inputs / outputs an audio signal, a control signal, and the like
to / from the communication control unit 10 of another acoustic unit 1 connected by the
connection unit 3. Further, when the communication control unit 10 newly detects a connection
with another sound unit 1, the communication control unit 10 calculates the number of sound
units connected and outputs the calculated number to the main unit 1B. Furthermore, the
communication control unit 10 includes a rotation amount detection unit 101 configured by an
angle sensor such as a rotary encoder. The amount-of-rotation detection unit 101 detects the
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amount of rotation between the sound unit 1 connected thereto and outputs the detected amount
of rotation to the main unit 1B. As mentioned above, main unit 1B can acquire the amount of
rotations between each sound unit 1A-1C.
[0021]
Furthermore, in addition to the function of the communication control unit 10 described above,
the communication control unit 10 of the main unit 1 B inputs and outputs an audio signal, a
control signal, and the like to the functional module 2. When the communication control unit 10
of the main unit 1 B detects a connection with the functional module 2, the communication
control unit 10 requests the functional module 2 to output a function identification signal for
identifying the function of the functional module 2. Obtain an identification signal. In addition,
the communication control unit 10 of the main unit 1B collects the sound collection beam signal
input from the audio signal processing unit 13 and the sound collection beam signal input from
the sub units 1A and 1C, the sound collection signal having the highest signal level The beam
signal is selected and output to the functional module 2. Further, the communication control unit
10 of the main unit 1B outputs the sound emission sound signal input from the functional
module 2 to the sound signal processing unit 13 of the own device and outputs the sound signal
to the sub units 1A and 1C.
[0022]
The control unit 11 controls the switching unit 14 by outputting a sound collection instruction
signal for instructing the function of the sound collection / combination element MS1 to MS6 to
the switching unit 14. Further, the control unit 11 outputs a directivity instruction signal for
instructing at least one of sound emission directivity and sound collection directivity to the audio
signal processing unit 13 to control the audio signal processing unit 13.
[0023]
Further, in addition to the function of the control unit 11 described above, the control unit 11 of
the main unit 1B determines the acoustic function of the acoustic units 1A to 1C, and generates
an emitted sound generation instruction signal and a directivity instruction signal. Specifically,
the control unit 11 of the main unit 1B acquires the relative positional relationship of the sound
units 1A to 1C based on the number of sound units and the amount of rotation between the
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sound units 1A to 1C. The control unit 11 of the main unit 1B determines the acoustic function of
the entire acoustic unit 1 based on the function identification signal of the functional module 2
input from the communication control unit 10. The control unit 11 of the main unit 1B generates
an emitted / collected sound instruction signal and a directivity instruction signal for each of the
acoustic units 1A to 1C based on the acoustic function of the entire acoustic unit 1 and the
relative positional relationship of the acoustic units 1A to 1C. Do. The details of the sound
function determination process of the sound units 1A to 1C in the main unit 1B will be described
later.
[0024]
The storage unit 12 is referred to as a relative positional relationship database (hereinafter
referred to as a relative positional relationship DB) shown in FIG. And the function switching
database shown in FIG. 4 (hereinafter referred to as a function switching DB). And a sound
emission and collection database shown in FIG. 5 (hereinafter referred to as a sound emission
and collection DB). And is referred to by the control unit 11 of the main unit 1B. The storage unit
12 may include only the main unit 1B.
[0025]
As shown in FIG. 3, the relative positional relationship DB stores relative positional relationships
corresponding to the number of acoustic units constituting the acoustic system 100 and the
amount of rotation between the acoustic units 1A to 1C. When acquiring the number of acoustic
units and the amount of rotation between the acoustic units 1A to 1C, the control unit 11 can
acquire the relative positional relationship by referring to the relative positional relationship DB.
For example, when the number of acoustic units is three and the amount of rotation between the
acoustic units 1A and 1B and between the acoustic units 1B and 1C is 180 degrees, the relative
positional relationship in which the acoustic units 1A to 1C are disposed on a straight line It
turns out that it has become.
[0026]
As shown in FIG. 4, the function switching DB stores the sound function of the sound unit 1
corresponding to the function identification signal of the function module 2 and the function of
the function module 2. When acquiring the function identification signal of the functional module
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2, the control unit 11 can acquire the acoustic function of the acoustic unit by referring to the
function switching DB. For example, when the function identification signal 03 is acquired from
the function module 2 having the audio conference function, it can be understood that control
may be performed so that the sound emitting and collecting function is provided in all the sound
units 1A to 1C.
[0027]
As shown in FIG. 5, the sound emission and collection DB is a sound emission and collection per
sound unit 1A to 1C corresponding to the relative positional relationship for each sound function
(sound emission, sound collection, sound emission) of the entire sound unit 1 The functions and
directivity of the shared elements MS1 to MS6 are stored. When the control unit 11 acquires the
acoustic function of the entire acoustic unit 1 and the relative positional relationship of the
acoustic units 1A to 1C, the acoustic function of each of the acoustic units 1A to 1C and the
acoustic unit 1A can be obtained by referring to the sound emission and collection DB. Since it is
possible to acquire the sound emission and reception directivity of 1 C, the sound emission and
collection instruction signal and the directivity instruction signal can be generated for each of the
sound units 1A to 1C. For example, in the case of a relative positional relationship in which two
sound units 1 are disposed on a straight line, the sound unit 1 as a whole has a sound emission
function, the sound emission of L channel from the sound unit 1 arranged on the L direction side
It can be understood that the directivity may be controlled so as to output a beam signal and
output a sound emission beam signal of the R channel from the acoustic unit 1 disposed on the R
direction side.
[0028]
The sound signal processing unit 13 includes a sound collection signal processing unit 131 and a
sound emission signal processing unit 132, and performs various sound signal processing based
on the directivity instruction signal input from the control unit 11.
[0029]
When the sound emitting and receiving elements MS1 to MS6 function as a microphone, only the
sound collecting signal processing unit 131 functions and the sound emitting signal processing
unit 132 does not function.
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The sound collection signal processing unit 131 performs delay processing and the like on the
sound collection signals input from the sound emission and collection combined elements MS1 to
MS6 based on the directivity instruction signal, and generates a sound collection beam signal.
[0030]
When the sound emission and collection / use elements MS1 to MS6 function as speakers, the
sound collection signal processing unit 131 is not functioned, and only the sound emission signal
processing unit 132 is functioned. The sound emission signal processing unit 132 performs
delay processing and the like on the sound emission sound signal input from the communication
control unit 10 based on the directivity instruction signal, generates an individual sound
emission sound signal, and discharges the sound emission sound signal. It outputs to sound
combining elements MS1 to MS6. The individual sound emission sound signal is formed for each
of the sound emission and collection combined elements MS1 to MS6 functioning as a speaker,
and is given to the sound emission and collection combined elements MS1 to MS6, whereby
directivity from the sound emission and collection combined elements MS1 to MS6 is obtained.
And an audio signal formed to realize an emitted sound.
[0031]
When the sound emitting and combining elements MS1 to MS6 are mixed with one functioning
as a microphone and one functioning as a speaker, the sound collection signal processing unit
131 and the sound emission signal processing unit 132 are caused to function. In this case, the
sound collection signal processing unit 131 performs delay processing and the like on the sound
collection signal input from the sound emission combining element MS functioning as a
microphone based on the directivity instruction signal, and a sound collection beam signal
Generate Further, the sound emission signal processing unit 132 performs delay processing and
the like on the sound emission sound signal input from the communication control unit 10 based
on the directivity instruction signal to generate an individual sound emission sound signal, An
individual sound emission sound signal is output to the sound emission and sound combining
element MS functioning as a speaker.
[0032]
The switching unit 14 switches whether to cause each of the sound emission and collection
combining elements MS1 to MS6 to function as a speaker or function as a microphone based on
the sound emission and collection instruction signal input from the control unit 11.
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[0033]
The sound emission and collection combining elements MS1 to MS6 are elements functioning as
a speaker and a microphone, and are connected to the audio signal processing unit 13 via the
switching unit 14.
The respective sound emitting and collecting elements MS1 to MS6 emit the individual sound
emitting sound signals input from the sound emitting signal processing unit 132 when
functioning as speakers. Further, when functioning as microphones, each of the sound emission
and collection elements elements 1 to 6 collects the surrounding sound to generate a sound
collection signal, and outputs the sound collection signal to the sound collection signal
processing unit 131. In the present embodiment, six sound emitting and collecting elements MS1
to MS6 are provided in one acoustic unit 1. However, one or more sound emitting and generating
elements MS may be provided according to the specification.
[0034]
The functional module 2 has different configurations according to the function of its own device,
but includes at least the operation unit 20, the control unit 21, and the communication control
unit 22 in common.
[0035]
The operation unit 20 receives an operation input from the user and outputs various operation
signals to the control unit 21.
For example, the operation unit 20 outputs, to the control unit 21, a start signal for instructing
start of sound collection or sound emission, a volume adjustment signal for instructing sound
emission volume, and the like.
[0036]
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The control unit 21 controls various functional units (not shown) in accordance with various
operation signals from the operation unit 20. For example, when the functional module 2 has a
recording function, the control unit 21 controls to store an audio signal input from the
communication control unit 22 in a storage unit (not shown). When the functional module 2 has
an audio conference function, the control unit 21 transmits an audio signal input from the main
unit 1B to another audio conference apparatus via the network, and receives audio from another
audio conference apparatus. The communication control unit 22 is controlled to output a signal
to the main unit 1B as a sound emission sound signal. Furthermore, when the functional module
2 has a reproduction function of an audio signal, the control unit 21 outputs the audio signal
input from the input interface (not shown) to the main unit 1B as a sound emission audio signal.
Control 22
[0037]
The communication control unit 22 controls input / output of audio signals and control signals to
the communication control unit 10 of the main unit 1B. Further, when requested by the main
unit 1B to output a function identification signal for identifying the function of the function
module 2, the communication control unit 22 outputs the function identification signal of the
function module 2 to the main unit 1B.
[0038]
Next, the details of the sound function determination process of each of the sound units 1A to 1C
in the main unit 1B will be described with reference to FIG. FIG. 6 is a flow chart showing the
determination processing flow of the sound function of each sound unit.
[0039]
As shown in FIG. 6, when the control unit 11 of the main unit 1B receives the input of the
function identification signal of the functional module 2 (S101: Yes), the control unit 11 performs
the process of step S102 and subsequent steps. When the connection of the functional module 2
is not detected, the processes after step S102 are not performed.
[0040]
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The control unit 11 refers to the function switching DB (see FIG. 4) stored in the storage unit 12
and identifies the function of the functional module 2 based on the input function identification
signal of the functional module 2 (S102). The sound functions of the sound units 1A to 1C as a
whole are determined (S103). That is, all the sound units 1A to 1C function as a speaker array to
be a sound output device, or function as a microphone array to function as a sound collection
device, or part of the sound units 1A to 1C function as a speaker array, It is determined whether
the rest is made to function as a microphone array to be a sound emitting and collecting device.
[0041]
The control unit 11 acquires the number of acoustic units, which is the total number of all the
acoustic units 1A to 1C connected (S104), and acquires the amount of rotation between the
acoustic units 1A to 1C (S105). The control unit 11 refers to the relative positional relationship
DB stored in the storage unit 12 to acquire the relative positional relationship corresponding to
the number of acoustic units and the amount of rotation between the respective acoustic units
1A to 1C, It determines (S106).
[0042]
The control unit 11 refers to the sound emission and collection DB stored in the storage unit 12
and acquires the functions of the sound emission and collection combined elements MS1 to MS6
corresponding to the acquired relative positional relationship for each of the sound units 1A to
1C. Then, the functions of the sound emission and collection / use elements MS1 to MS6 for each
of the sound units 1A to 1C are determined (S107). The control unit 11 generates a sound
emitting and receiving instruction signal for each of the sound units 1A to 1C based on the
determined sound function (S108).
[0043]
The control unit 11 refers to the sound emission and collection DB stored in the storage unit 12
to acquire the sound emission and reception directivity of the sound units 1A to 1C
corresponding to the acquired relative positional relationship, and the sound unit 1A Sound
emission directivity of ~1 C is determined (S109). The control unit 11 generates a directivity
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instruction signal for each of the sound units 1A to 1C based on the determined sound emission
directivity (S110).
[0044]
In the above process flow, when the control unit 11 of the main unit 1B generates the collected
sound instruction signal and the directivity instruction signal, the generated control signal of the
emitted sound signal and the directivity instruction signal is controlled to the sub units 1A and
1C. Output to section 11. The control unit 11 of each of the sound units 1A to 1C outputs the
sound collection and reception instruction signal to the switching unit 14 to control the
switching unit 14 and outputs the sound collection instruction signal to the audio signal
processing unit 13 The signal processing unit 13 is controlled.
[0045]
Thereby, the main unit 1B can appropriately determine the sound function of each of the sound
units 1A to 1C according to the function of the function module 2. For example, when the main
unit 1B identifies that the function of the functional module 2 is an external input function of an
audio file, it can cause each of the acoustic units 1A to 1C to function as a sound emitting device.
In addition, when the main unit 1B identifies that the function of the functional module 2 is the
recording function, the main unit 1B can cause each of the sound units 1A to 1C to function as a
sound collection device.
[0046]
Further, the main unit 1B can determine the emitted sound collecting directivity of each of the
sound units 1A to 1C according to the relative positional relationship of the sound units 1A to
1C. As mentioned above, the sound system 100 can perform various sound functions only by
replacing the functional module 2 without replacing the sound unit 1. Moreover, the sound
system 100 can control the sound emission directivity only by rotating the sound unit 1.
[0047]
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In this embodiment, the relative positional relationship is measured based on the number of
acoustic units and the amount of rotation detected by the rotational amount detection unit 101.
However, based on the number of acoustic units and the amount of fluctuation, the relative
positional relationship is calculated. It may be measured. For example, when the distance
between the sound units 1A to 1C can be changed, the relative positional relationship is
measured based on the number of sound units and the variation amount of the distance between
the sound units 1A to 1C.
[0048]
Further, in the present embodiment, when the main unit 1B detects the connection of the
functional module 2, the output request of the function identification signal for identifying the
function of the functional module 2 is performed. However, when it is detected that the
functional module 2 is connected to the main unit 1B, the functional module 2 may automatically
output the function identification signal.
[0049]
Furthermore, in the present embodiment, the main unit 1B generates the sound emission and
reception instruction signal and the directivity instruction signal of all the sound units 1A to 1C.
However, each of the acoustic units 1A to 1C may measure the relative positional relationship,
and may generate a sound emission and reception instruction signal and a directivity instruction
signal of the own device.
[0050]
In addition, in the present embodiment, the communication control unit 10 of the main unit 1B
selects the sound collection beam signal having the highest signal level from the sound collection
beam signals generated by the respective acoustic units 1A to 1C and selects the functional
module 2 Output to However, the communication control unit 10 of the main unit 1B combines
the sound collection beam signals whose signal level is equal to or higher than the threshold
among the sound collection beam signals generated by the acoustic units 1A to 1C, and It may be
output to the functional module 2. Alternatively, the sound collection beam signals generated by
the respective sound units 1A to 1C may be combined and output to the functional module 2 via
the communication control unit 10.
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[0051]
It is a figure which shows the application example of an acoustic system. It is a block diagram
which shows the function and structure of an acoustic system. An example of a relative positional
relationship database is shown. An example of the function switching database is shown. An
example of a sound emission and collection database is shown. It is a flowchart which shows the
determination processing flow of the acoustic function of each acoustic unit.
Explanation of sign
[0052]
DESCRIPTION OF SYMBOLS 1 (1A-1C) ... acoustic unit, 2 ... functional module, 3 ... connection
part, 10 ... communication control part, 11 ... control part, 12 ... memory part, 13 ... audio signal
processing part, 14 ... switching part, 20 ... Operation unit, 21 ... control unit, 22 ...
communication control unit, 100 (100A to 100C) ... sound system, 101 ... rotation amount
detection unit, 131 ... sound collection signal processing unit, 132 ... sound emission signal
processing unit, MS 1 to MS 6 ... Ejecting sound combined element
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