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JP2008005346

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Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
financial decisions, should not be based on machine-translation output.
DESCRIPTION JP2008005346
Abstract: The present invention provides an acoustic reflection device capable of transmitting
voice efficiently by controlling the sound emission direction of the voice and without degrading
the quality. A speaker array in which speakers arranged in a downward direction are arranged in
an array, and an audio signal transmitting / receiving device incorporating microphone arrays
ML and MR in an array on both sides thereof and a frame 16 supporting the microphones.
Further, facing the direction of the speaker, an acoustic reflection unit 91A provided with a peak
line portion 911A and slopes 912A and 913A and an acoustic reflection device 9A including legs
92A and 93A are provided. The acoustic reflection device 9A reflects the emitted sound in the ±
Y direction. The inside of the acoustic reflector 91A is hollow at the inner side of the slopes 912
and 913 of the acoustic reflector 9A, and the cable is passed. [Selected figure] Figure 8
Acoustic reflector
[0001]
The present invention relates to an acoustic reflection device for controlling the sound emission
direction of a speaker.
[0002]
Conventionally, proposals have been made to adjust the sound emission direction of speech.
Patent Document 1 discloses a speaker directed to either the upper or lower direction and an
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acoustic reflector facing the sound emission direction of the speaker in order to construct a
nondirectional speaker that radiates voice evenly around the horizontal direction. ing.
[0003]
In addition, an audio signal transmitting / receiving apparatus for transmitting / receiving an
audio signal between remote places via a network has been put to practical use. This device can
perform voice teleconferencing such as a telephone call or voice teleconferencing by transmitting
and receiving voice signals between remote places. As a configuration of this audio signal
transmitting / receiving device, one in which a speaker of the audio signal transmitting /
receiving device is disposed to emit sound toward the bottom, and one that reflects audio on a
table top of a table on which the audio signal transmitting / receiving device is installed There is.
Patent Document 2 discloses an audio signal transmitting / receiving device that emits sound
from a speaker disposed on the top of the main body toward the ceiling and the periphery in the
horizontal direction. Japanese Patent Application Laid-Open No. 60-199296 Japanese Patent
Application Laid-Open No. 8-298696
[0004]
However, in the configuration of Patent Document 1, it is a solution task to emit nondirectional
voice, so even if it is applied to the voice conference apparatus as it is, the voice is efficiently
transmitted to the speaker in a predetermined direction. It was difficult to control.
[0005]
Further, in the conventional configuration in which the speaker of the audio conference
apparatus emits the sound downward, the speaker emits the voice toward the table parallel to
this, so the voice is reflected depending on the shape, material, etc. of the table surface. The
sound quality is easily influenced by the usage environment.
[0006]
Further, in the configuration of Patent Document 2, since the voice is emitted toward the ceiling,
there is a problem that the voice can not be efficiently emitted to the speaker who is around the
voice signal transmitting and receiving apparatus.
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For example, even if there is a speaker on only one side of the table on which the voice signal
transmitting / receiving apparatus is installed, there is a problem that the same volume as the
case where the speaker is on both sides of the table has to be emitted.
[0007]
Therefore, in view of the above problems, the present invention has an object to provide an
acoustic reflection device capable of transmitting voice efficiently by controlling the sound
emission direction of the voice and without degrading the quality.
[0008]
(1) The present invention comprises: a leg portion for supporting a speaker at a predetermined
height; a peak portion opposed to the sound emission direction of the speaker and disposed in
parallel to the emission surface of the speaker; An acoustic reflection portion having slopes
provided on both sides of the portion.
[0009]
In this configuration, since the acoustic reflection portion has slopes provided on both sides of
the peak portion facing in the sound emission direction of the speaker, two slopes allow the
sound emitted from the speaker to be on both sides of the peak portion. It is reflected.
Therefore, unlike the conventional case where the speaker is directed to the table, the sound can
be efficiently emitted to both sides of the speaker.
In addition, since it is not influenced by the state of reflection of the sound on the table surface, it
is possible to emit sound of a constant level of sound quality regardless of the installation
surface.
As described above, according to the present invention, voice can be transmitted to the speaker
efficiently and without degrading the quality.
[0010]
(2) The present invention is characterized in that the acoustic reflection portion has a hollow
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portion inside a slope provided on both sides of the ridge portion.
[0011]
In this configuration, not only the function of reflecting the sound originally possessed by the
acoustic reflection portion but also the function of blinding the cable to maintain the aesthetic
appearance.
In this configuration, since the two functions are combined in this way, the audio signal
transmitting / receiving device can be compactly and rationally arranged.
[0012]
(3) The present invention is characterized in that, in the acoustic reflection portion, a cable
connected to the speaker is passed through the hollow portion.
[0013]
In this configuration, since the cable connected to the speaker is passed through the hollow
portion, the audio signal transmitting / receiving device can be arranged compactly and
rationally.
[0014]
(4) The present invention is positioning means for positioning the positional relationship
between the peak line portion of the acoustic reflection portion and the speaker, wherein the
peak line portion of the acoustic reflection portion and the vicinity of the central portion of the
diaphragm of the speaker It further includes positioning means for positioning in either a first
positional relationship in which the two face each other or in a second or third positional
relationship in which the peak line portion of the acoustic reflection portion and the vicinity of
both ends of the diaphragm of the speaker face each other. .
[0015]
In this configuration, positioning means is provided for positioning the positional relationship
between the peak line portion of the acoustic reflection portion and the center line of the
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speaker, and when positioned in the first positional relationship, the acoustic reflection portion is
the peak The sound is distributed to both sides of the line and reflected.
When positioned in either the second or third positional relationship, the acoustic reflection
portion attenuates the reflection of the sound toward the end and reflects most of the sound
toward the other side of the end.
Therefore, when only one side of the voice signal transmitting and receiving apparatus has a
speaker, the voice can be reflected to one side without any waste and emitted.
As described above, according to the configuration of the present invention, it is possible to
transmit voice to the speaker efficiently by controlling the sound emission direction of the voice
and without degrading the quality.
[0016]
In addition, this "central part of a speaker array" means the central point of a speaker, if one
speaker is. When the speakers are arranged in a line, it means a line connecting the centers of
the diaphragms of the speakers. When arranged in a plurality of rows, it means a straight line
drawn in the long axis direction of the speaker array at the central portion in the short axis
direction of the speaker array. The "both ends of the diaphragm of the speaker" means the
vicinity of the edge of the speaker when one speaker or the speakers are arranged in a line.
When arranged in a plurality of rows, it means near the edge of the outermost part of the
plurality of rows.
[0017]
The positioning method of the positioning means can be realized, for example, by a slide
mechanism, a mechanism for locking it to the first to third positions, a method of providing a
mark or a groove which enables alignment, or the like.
[0018]
(5) In the present invention, the speaker comprises a speaker array in which a plurality of
speaker units are linearly arranged, and the peak line portion is arranged in parallel with the
long axis direction of the array of the speaker array.
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[0019]
As a result, sound can be emitted in the direction of both sides of a straight line connecting the
axes of the speakers arranged in an array.
[0020]
(6) The present invention is characterized in that the acoustic reflection portion is fixed
substantially at the center of a flexible flat mat.
[0021]
In this configuration, since the sound reflecting portion is fixed to the flexible mat, the sound
signal transmitting / receiving device main body can be wrapped and carried by this mat.
Further, since the acoustic reflection portion is fixed substantially at the center of the flexible flat
mat, the mat also has an acoustic reflection portion.
[0022]
According to the present invention, it is possible to control the sound emission direction of the
speaker for the speaker who wants to transmit the sound without deteriorating the sound quality.
[0023]
The audio signal transmitting and receiving apparatus according to the first embodiment will be
described with reference to FIG.
In FIG. 1, the audio signal transmitting / receiving apparatus is used by being connected to a
network such as the Internet or LAN.
The audio signal transmitting and receiving apparatus 1 according to the first to fourth
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embodiments corresponds to an integrated audio signal transmitting and receiving apparatus
and the "acoustic reflection apparatus" of the present invention.
The audio signal transmitting / receiving apparatus 1 transmits / receives an audio signal to /
from another audio signal transmitting / receiving apparatus which is a partner apparatus via a
network.
The speaker uses the voice signal transmitting / receiving function of the voice signal
transmitting / receiving apparatus 1 to make a call, an audio conference, or the like.
[0024]
In the following, the audio signal transmitting and receiving device 1 will be simply referred to as
the “device 1” in the first to fourth embodiments.
[0025]
FIG. 1 is a view showing a usage pattern of the device 1.
The speakers 101 A, B sit opposite each other across the table 100, and the device 1 is placed on
the table 100. In the following, the direction in which the speaker 101A is present is described
on the left, and the direction in which the speaker 101B is present is described on the right.
[0026]
The device 1 includes a speaker array SPA in which speakers are arranged side by side in a depth
direction (direction perpendicular to the sheet of FIG. 1), and microphone arrays ML and MR
provided on the left and right of the speaker array SPA. Each speaker of the speaker array SPA is
provided with a diaphragm on the lower side of the main unit (in the direction toward the table
100), converts an audio signal transmitted from the other device into an audio signal, and emits
it toward the table 100 . This sound is reflected by the acoustic reflection device (precisely, the
acoustic reflection portion 2 described later), and emitted in the direction of the ranges 102 and
103 obliquely upward on the left and right of the table 100. The microphone arrays ML, MR are
respectively provided on both sides of the speaker array SPA, and pick up the voices of the
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speakers 101A, B and transmit them to the other device.
[0027]
The external view of the audio signal transmitting and receiving apparatus according to the
embodiment of the present invention will be described with reference to FIG. 2 (A) is a bird's-eye
view of the audio signal transmitting / receiving device, FIG. 2 (B) is an AA arrow view of FIG. 2
(A), and FIG. 2 (C) is B-B in FIG. 2 (A). A cross-sectional view (a cross-sectional view at the
position of the center of the speaker of the speaker array SPA), FIG. 2D is a component diagram
of the acoustic reflection unit 2.
[0028]
As shown in the external view of FIG. 2 (A), the device 1 is a long, substantially rectangular
parallelepiped device. The left and right directions of the speakers 101A and 101B shown in FIG.
1 correspond to the + Y direction and the −Y direction, respectively, the depth direction in FIG. 1
corresponds to the −X direction, and the near side in FIG. 1 corresponds to the + X direction.
The device 1 has the top panel 11, the legs 121 and 131 supporting the main body of the device
1, the side panels 12 and 13, the grille 14 for protecting the speaker array SPA, the display unit
150, the operation unit 151, and the like. 152, 153, and a connector group 3.
[0029]
The top panel 11 and the side panels 12 and 13 are made of, for example, a resin. The upper
surface panel 11 is a long member having a U-shaped cross section, and covers the frame 16 (see
FIG. 2C) incorporating the speaker array SPA, the microphone array ML, the MR, the signal
processing unit and the like. The side panels 12 and 13 are integrally formed with a box-like part
whose one side is open and a leg, and the box-like part covers and fixes the side face of the top
panel 11 in the ± Y direction. The lower surface grille 14 is a protection member of the speaker
array SPA, and is formed of a steel plate of a punched mesh having a substantially U-shaped
cross section so as not to disturb the sound emission and sound collection of the speaker array
SPA and the microphone arrays ML and MR.
[0030]
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At the X-side end of the upper surface of the upper surface panel 11, a display unit 150 and
operation units 151, 152, and 153 are embedded. The display unit 150 is provided on the −X
side of the top panel 11 and is an LCD (Liquid Crystal Display) for displaying a setting state and
the like. The operation units 151, 152, and 153 each include a numeric keypad or the like, and
receive an instruction to increase, decrease, or mute a volume, or an instruction to set the device
1.
[0031]
As shown in FIG. 2 (B), the connector group 3 is embedded in the side panel 12 on the X side,
and as the connector group 3, it is for connecting to a network such as Ethernet (registered
trademark) or a network such as the Internet. A modular jack 31, an audio input terminal 32 and
an audio output terminal 33 for connection to an audio device, and a power supply terminal 34
for connection to a power supply are provided. The cable 25 will be described later.
[0032]
By inserting a modular cable plug (not shown) into the modular jack 31, the device 1 can be
connected to the network. As a result, the device 1 can be connected to the network, and a call
can be made with the voice signal transmitting / receiving device 1 of the other party, and the
device 1 can be used as an IP telephone or a voice conference device.
[0033]
Also, an external audio device is connected to the audio input terminal 32 via an audio cable. The
reproduction signal input from the audio device is input to the device 1 and emitted by the
speaker array SPA.
[0034]
The internal structure of the device 1 will be described with reference to FIGS. 2 (C) and 2 (D). As
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shown in FIG. 2C, the apparatus 1 includes a speaker array SPA, microphone arrays ML and MR,
and a frame 16 incorporating these SPA, ML and MR in the upper surface panel 11 and the lower
surface grille 14; And an acoustic reflector 2 for reflecting the sound of the speaker array SPA to
the speaker side in the ± Y direction.
[0035]
In the present embodiment, the audio signal transmitting / receiving apparatus 1 integrally
configures the acoustic reflecting portion 2 and the legs 121 and 131 of the “acoustic reflecting
device” of the present invention, but the function of the acoustic reflecting portion 2 is It
corresponds to the function of the “acoustic reflector” of the invention.
[0036]
The speaker array SPA is composed of a plurality of speakers provided with a diaphragm at the
lower side, and arranged at substantially equal intervals in the ± X direction (directions
perpendicular to the sheet of FIG. 2C), respectively. Convert the voice signal into a voice and emit
it.
The microphone arrays ML and MR are disposed on both sides in the ± Y-axis direction
(corresponding to the left and right direction in FIG. 1), and pick up speech sound signals of the
speakers 101A and 101B. The speech signal is processed by an internal signal processing unit
and transmitted to the other device.
[0037]
As shown in FIG. 2 (D), the acoustic reflection portion 2 is a long-axis shaped member having a
ridge 21 and slopes 22 and 23. The side surface in the major axis direction of the acoustic
reflection portion 2 is in contact with the side panels 12 and 13, and the peak line portion 21 is
provided to face each of the speakers constituting the speaker array SPA as shown in FIG. It is
done.
[0038]
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The slopes 22 and 23 of the acoustic reflection portion 2 are formed in a curved shape whose
cross section is curved inside the slopes 22 and 23. The acoustic reflection unit 2 reflects the
sound emitted from the speaker array SPA in the ± Y direction, and emits the sound to the
ranges 102 and 103 shown in FIG. As shown by dotted lines in FIG. 2C, the incident angle and
the reflection angle of the sound are reflected in the same direction with respect to the tangential
direction of the position where the sound of the slopes 22 and 23 is reflected. The acoustic
reflection unit 2 can emit the sound emitted from the speaker array SPA efficiently in the ± Y
direction and without degrading the quality.
[0039]
Further, as shown in FIG. 2C, inside the acoustic reflection portion 2, there is a hollow portion 24
between the slopes 22 and 23 of the acoustic reflection portion 2 and having a depth from the
leg 121 to the leg 131. It is formed and through which the cable 25 can pass. Thus, for example,
when a plurality of apparatuses 1 are connected in a connected manner in the ± X direction,
cables of audio signals can be passed through the respective audio signal transmitting / receiving
apparatuses.
[0040]
An embodiment in which a large number of voice signal transmitting / receiving apparatuses are
connected in the ± X direction and connected will be described with reference to FIG. FIG. 3
shows devices 1A, 1B, 1C, 1D, 1E in which five devices 1 are connected. In addition, in FIG. 3,
about each apparatus 1A, 1B, 1C, 1D, and 1E, the width | variety on either side is fractured |
ruptured and the center is partially abbreviate | omitted.
[0041]
By inserting plugs of cables 25A, 25B, 25C, 25D, 25E corresponding to the cable 25 into the
terminal unit 3, a plurality of apparatuses 1 can be connected to the network and can talk with
the other apparatus. . The cables 25A, 25B, 25C, 25D, 25E are hollow portions inside the
acoustic reflectors 2A, 2B, 2C, 2D, 2E (corresponding to 24 in FIG. 2) as shown in FIG. 2B. It is
passed through. There is a router (not shown) on the left of the device 1A, and a cable 25A is
connected to the device 1A. The cables 25B, 25C, 25D, 25E are inserted inside the acoustic
reflection portion 2A to connect the cable 25B to the device 1B. The cables 25C, 25D, and 25E
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are inserted inside the acoustic reflection portion 2B, and the cable 25C is connected to the
device 1C. The cables 25D, 25E are inserted inside the acoustic reflection part 2C, and the cable
25D is connected to the device 1D. Inside the acoustic reflection portion 2D, a cable 25E is
passed, and the cable 25E is connected to the device 1E. Thus, the acoustic reflector 2 also has a
role of hiding the cables 25B-E.
[0042]
Next, blocks of the device 1 will be described with reference to FIG. The configuration shown in
FIG. 4 is built in the top panel 11 of the device 1. The device 1 includes a network interface 50
for communicating with a partner device, a modular jack 31, a signal processing unit 51 for
processing an audio signal to be transmitted and received, an audio input terminal 32 for
inputting an output signal of the audio device 6, and a signal An audio output terminal 33 is
provided to output the audio signal processed by the processing unit to the outside.
[0043]
Further, the device 1 transmits the collected sound signal having directivity in the direction of
the speakers 101A and B and the position information of the speakers 101A and 101B to the
other device 1, and the other device 1 together with the speaker position information The
received voice signal is emitted in the direction of the speaker position. Therefore, the device 1
includes the sound emission beam processing unit 52 and the sound collection beam processing
unit 55.
[0044]
The network interface 50 is a control unit that controls communication with a partner apparatus
via a network, and is connected to the modular jack 31 in the terminal unit 3.
[0045]
The signal processing unit 51 is connected to the network interface 50, receives an audio signal
from the opposite device in packet units, decodes this audio signal to convert it into a bit stream,
and inputs it to the sound emission beam processing unit 52.
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Further, the signal processing unit 51 is connected to the sound collection beam processing unit
55, and has a function of packetizing the audio signal processed by the signal processing unit 55
and transmitting it to the network through the network interface 50. Further, the signal
processing unit 51 processes an audio signal input from the external audio device 6 through the
audio input terminal 32. Furthermore, the signal processing unit 51 processes the audio
collected by the microphone array or the audio signal input from the audio input terminal, and
outputs the processed audio signal to an external audio device through the audio output terminal
33.
[0046]
The sound emission beam processing unit 52 generates a sound emission beam having
directivity at the position indicated by the position information sent from the other device. The
sound emission beam reproduces the sound expanded from the focal point behind the speaker
array SPA by each speaker of the speaker array SPA, and adjusts the output timing of the audio
signal for each speaker of the speaker array SPA and outputs it . As a result, it sounds as if the
speaker is at the position of this focal point, and the voice can be transmitted between the other
device without losing the sense of reality of the voice.
[0047]
The sound collection beam processing unit 55 searches for the positions of the speakers 101 A
and B, generates a sound collection beam having directivity at the positions of the speakers, and
inputs this to the signal processing unit 51. The generation of the sound collection beam is
performed by adjusting the timing of inputting the sound signal collected by each of the
microphones ML and MR. When this timing is adjusted, the voice signal in the directed direction
is emphasized in phase and picked up, and the voice signals in the other areas are picked up in
phase offset and canceled and picked up. In the method of searching for the positions of the
speakers 100A and B, the sound collection beam processing unit 55 generates voice beams
having directivity in a plurality of predetermined directions, respectively, and the sound
collection of the signal level is large. This is done by selecting the beam and the corresponding
direction. The sound collecting beam processing unit 55 inputs the searched position and the
sound collecting beam corresponding to the position to the signal processing unit 51.
[0048]
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According to the above-described configuration, it is possible to give a voice to a meeting
attendee who is a user as if the other party's speaker is at the position of the virtual sound
source.
[0049]
In the device 1 of the first embodiment, the position information is transmitted to generate the
sound emission beam and the sound collection beam, but it is not necessary to generate these,
and multi-channels obtained by the microphone arrays ML and MR. The voice signal of may be
transmitted as it is.
Further, the acoustic reflection unit 2 has an effect of efficiently emitting sound in the ± Y
direction not only to the speaker array SPA but also to one speaker.
[0050]
Next, the configuration of the second audio signal transmitting / receiving device according to
the application of the audio signal transmitting / receiving device of the first embodiment will be
described using the configuration diagram of FIG. The voice signal transmitting and receiving
apparatus according to the second embodiment differs from that of the first embodiment in that
the slide mechanism 7 of the acoustic reflection unit 2 for adjusting the direction of voice to be
transmitted to the speakers 101A and 101B has legs 121 and 131. Prepare on top of. Except for
this, the second embodiment is the same as the first embodiment, and the above description is
applied accordingly. FIGS. 5A to 5C correspond in positional relationship to FIG. 2C which is a
cross-sectional view of the device 1 of the first embodiment taken along line B to B. FIG.
[0051]
The slide mechanism 7 is provided on the base 20, supports the entire acoustic reflection unit 2
and guides the slide of the acoustic reflection unit 2 in the ± Y direction and lightly locks the
position of the acoustic reflection unit 2 on this guide It has a lock mechanism. The speaker array
SPA is aligned in a direction perpendicular to the paper surface of FIG. 5, and the peak line
portion 21 of the acoustic reflection portion 2 moves in parallel to the direction in which the
speaker array SPA is aligned. The position where the lock mechanism locks the acoustic
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reflection portion 2 is the central axis 105 of the speaker constituting the speaker array SPA, one
of the end portions 106 and 107 of the diaphragm of the speaker, and the peak line portion 21
of the acoustic reflection portion 2 Position.
[0052]
FIGS. 5A to 5C show the locked state at any one of these three points. When the acoustic
reflection portion 2 is located at the position shown in FIG. 5A, the acoustic reflection portion 2
reflects the sound in the ± Y direction and emits the sound in both sides in the ± Y direction.
When locked at the position shown in FIG. 5B, the distance between the peak line portion 21 and
the end portion 106 of the speaker array SPA is narrow, thereby attenuating the sound in the + Y
direction and most of the sound of the speaker array SPA. On the -Y side. As a result, when there
is no speaker 101A, it is possible to enhance the transmission efficiency of voice to the speaker
101B side. When locked at the position shown in FIG. 5C, the distance between the peak line
portion 21 and the end 107 of the speaker array SPA is narrow, so that the sound in the -Y
direction is attenuated and the sound of the speaker array SPA is reduced. Sound on the + Y side.
As a result, when the speaker 101B is not present, it is possible to enhance the transmission
efficiency of voice to the speaker 101A side.
[0053]
Next, the configuration of a third audio signal transmitting / receiving device according to an
application of the audio signal transmitting / receiving device of the second embodiment will be
described using the configuration diagram of FIG.
[0054]
In this embodiment, as in the second embodiment, the slide mechanism 7A corresponding to the
slide mechanism 7 is provided, and FIGS. 6 (A) to 6 (C) correspond to FIGS. 5 (A) to 5 (C). There
is.
Unlike the above embodiment, the lower surface grille 14 is divided into the lower surface grille
141 and 142 and provided to the position of the slide mechanism 7 on the bottom surface, and
the peak line portion 21 of the acoustic reflection portion 2 is brought close to the speaker array
SPA. There is. Except for this difference, the second embodiment is the same as the second
embodiment, and the above description applies accordingly. In this embodiment, since the
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position of the peak line portion 21 of the acoustic reflection portion 2 is high, the effect of
blocking the sound emitted to the end side when the acoustic reflection portion 2 is moved to the
end portions 106 and 107 Can be higher than in the second embodiment, and the transmission
efficiency of voice to the opposite side can be enhanced.
[0055]
Next, an audio signal transmitting and receiving apparatus according to a fourth embodiment of
the application of the audio signal transmitting and receiving apparatus according to the first to
third embodiments will be described with reference to FIG. The audio signal transmitting /
receiving apparatus of this embodiment differs from that of the first embodiment in that it
comprises a flexible mat 8. The rest is the same as that of the first embodiment except for the
mat 8, and the above description is applied accordingly. As shown in FIG. 7A, in this embodiment,
the acoustic reflection portion 2 is not fixed to the legs 121 and 131, and the base 20 and the
acoustic reflection portion 2 are at the central portion of the mat 8 in the ± Y axis direction. It is
fixed and an acoustic reflection device is configured. The mat 8 is provided with hooks 81 and 82
on the ± X axis side of the acoustic reflection portion 2 and hooks and fixes the hooks 81 and
82 on buttons (not shown) provided on the legs 121 and 131. In addition, hanging holes 83 and
84 are provided at both ends in the ± Y-axis direction of the mat 8. As shown in FIG. 7 (B), the
device 1 can be wrapped to align the hanging holes 83 and 84, and the device 1 can be carried.
As described above, the mat 8, the base 20, and the acoustic reflector 2 are integrated and have a
role as a carrying case, a role to control the sound emission direction, and a role to blindly pass
the cable 25. ing.
[0056]
Three hooks are provided on each of the legs 121 and 131, and the peak line portion 21 of the
acoustic reflection portion 2 in the ± Y direction as in the second embodiment, of the center line
105 and the end portions 106 and 107 of the speaker. A configuration is also possible in which
the position is fixed. According to this configuration, the sound emission direction of the voice
can be adjusted. Further, the slide mechanism 7 may be provided between the mat 8 and the
acoustic reflection portion 2. Also in this case, the sound emitting direction of the voice can be
adjusted as in the second embodiment.
[0057]
Further, although the above embodiment has been described using transmission and reception of
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voice signals of the speakers 101A and 101B, the apparatus 1 can transmit and receive not only
the voice of the speaker but also music and sound effects.
[0058]
Next, Examples 1 to 3 of the acoustic reflection device of the fifth embodiment relating to the
application of the above embodiment will be described with reference to FIGS.
The audio signal transmitting / receiving device 1G or 1H of this embodiment and the acoustic
reflecting devices 9A, 9B, 9C are separate devices, and the acoustic reflecting devices 9A, 9B, 9C
are options attached to the audio signal transmitting / receiving devices 1G, 1H. . The audio
signal transmitting / receiving device 1G or 1H corresponds to the audio signal transmitting /
receiving device according to the above embodiment except the acoustic reflection unit 2 and the
base 20, and is mounted on any of the acoustic reflection devices 9A to 9C and fixed. It is done.
The main difference between the audio signal transmission / reception device 1G or 1H is that
the audio signal transmission / reception device 1 and the acoustic reflection unit 2 are not
included. Therefore, in the following, the same reference numerals are used for each
configuration of the audio signal transmission / reception device 1G. The above explanation
applies mutatis mutandis.
[0059]
Example 1 of the fifth embodiment will be described with reference to FIG. As shown in FIG. 8A,
in the first embodiment, the audio signal transmitting / receiving device 1G is placed on and
fixed to the acoustic reflection device 9A. As shown in FIG. 8B, the acoustic reflection device 9A
includes an acoustic reflection portion 91A (corresponding to the acoustic reflection portion 2 in
the above embodiments) having a peak line portion 911, slopes 912 and 913, and a leg 92A, It
has 93A.
[0060]
The audio signal transmitting and receiving device 1 is fixed on the legs 92A and 93A of the
acoustic reflecting device 9A. Also in the first embodiment, the acoustic reflection device 9A can
transmit the voice emitted from the voice signal transmitting / receiving device 1 efficiently to
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the speakers in the ± Y direction without deteriorating the quality.
[0061]
Further, in the inside of the acoustic reflection portion 91A of the first embodiment, a hollow
portion 94A is formed as in the case of the acoustic reflection portion 2 of the above-described
embodiment, and the cable 25 can be passed. Therefore, as described with reference to FIG. 3,
when a plurality of audio signal transmitting / receiving devices (devices) 1G are mounted on the
acoustic reflection device 9A, a cable of audio signals is inserted in each hollow portion 94A. It
can pass.
[0062]
Furthermore, in order to apply Example 1 to the fourth embodiment, a member corresponding to
the mat 8 may be joined under the acoustic reflection portion 91A, and thereby the effect can be
exhibited.
[0063]
In the first embodiment, as in the second and third embodiments, the sound emission direction
can not be adjusted to any of the ± Y directions.
Since the audio signal transmitting / receiving device 1G is fixed on the acoustic reflection device
9A, the peak line portion 911 is located at the center line 105 of the speaker at the position
where the acoustic reflection portion 2 is aligned with the speaker as described in the above
embodiments. It is fixed directly below. This point is the same as in the following second
embodiment.
[0064]
Example 2 of the fifth embodiment will be described with reference to FIG. As shown in FIG. 9A,
in the second embodiment, the sound signal transmitting / receiving device 1G is placed on and
fixed to the acoustic reflection device 9B as in the first embodiment. As shown in FIG. 9B, in the
second embodiment, the acoustic reflecting portion 91B (corresponding to the acoustic reflecting
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portion 91A) has a semi-cylindrical shape, which is different from the first embodiment. The
explanation of Example 1 applies mutatis mutandis. Also in the second embodiment, the acoustic
reflection device 9B can efficiently transmit the voice to the speaker in the ± Y direction without
deteriorating the quality, and can pass the cable 25 through the hollow portion 94B. Further,
since the acoustic reflection portion 91B is semi-cylindrical, it is possible to pass a large number
of cables 25 or a thick cable through the hollow portion 94B.
[0065]
Example 3 of the fifth embodiment will be described with reference to FIG. As shown in FIG. 10A,
in the third embodiment, the audio signal transmitting / receiving device 1H is placed on the step
portions 95 and 96 of the acoustic reflecting device 9C, and both sides in the long axis direction
of the audio signal transmitting / receiving device 1 are It is inserted and fixed. As shown in FIG.
10B, three holes 971 to 973 and 981 to 983 are opened at both ends in the X axis direction of
the acoustic reflection device 9C. At the same time, in the side panels 12C and 13C of the audio
signal transmitting and receiving device 1H, the long axis direction of the case so that the
protrusion can be aligned with any of the holes 971 to 973 and any of the holes 981 to 983. One
on each side of the Thereby, the positional relationship between the speaker and the peak line
portion 911 can be matched by aligning the protrusion of the audio signal transmitting /
receiving device 1H with each of the three holes 971 to 973 and 981 to 983, respectively. Has
the same function as the slide mechanism 7 of FIG. Therefore, in the third embodiment, the
acoustic reflection device 9C can not only transmit voice to the speaker who is in the ± Y
direction efficiently and without degrading the quality, but also the sound emission direction of
the voice signal transmission / reception device 1 Can be adjusted to either left or right.
[0066]
The acoustic reflectors 9A, 9B and 9C of the present embodiment correspond to the "acoustic
reflector" of the present invention.
[0067]
The figure showing the usage form of the audio | voice signal transmitter / receiver which is 1st
Embodiment of this invention The block diagram of the audio | voice signal transmitter / receiver
which is 1st Embodiment of this invention The audio signal transmitter / receiver which installed
the audio | voice signal transmitter / receiver Wiring diagram of the cable in the case of a
plurality of arrangement block diagram of the processing unit of the same audio signal
transmitting and receiving device configuration diagram of the audio signal transmitting and
receiving device of the second embodiment according to the application of the device of the first
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embodiment The configuration diagram of the audio signal transmitting and receiving device of
the third embodiment according to the application of the device The configuration diagram of the
audio signal transmitting and receiving device of the fourth embodiment according to the
application of the device of the first to third embodiments Application form and configuration
diagram of Example 1 of the acoustic reflection device of the fifth embodiment according to the
application of the device of the fifth embodiment Acoustic reflection of the fifth embodiment
according to the application of the device of the first to fourth embodiments Usage pattern and
configuration diagram of the second embodiment of the device Diagram and use form of the
third embodiment of the acoustic reflector of the fifth embodiment according to the application
of the device of the fourth embodiment
Explanation of sign
[0068]
1, 1A, 1B, 1C, 1D, 1E, 1G, 1H-voice signal transmitting / receiving apparatus (apparatus) 11-top
panel, 12-side panel, 121-leg, 13-side panel 131-leg 14-lower surface grill 150-display unit 151operation unit 152-operation unit 153-operation unit 16-frame 16-acoustic reflection unit 20base 21-peak portion 22-slope 23-slope 24-cavity 25-cable, 3-terminal section, 31-modular jack
32-audio input terminal, 33-audio output terminal 50-network interface 51-signal processing
section, 52-sound emitting beam processing section 55-sound collecting beam processing
section, 6 -Audio equipment 7-Slide mechanism, 8-mat, 83-Hanging hole, 84-Hanging hole 9AAcoustic reflection device, 9B-Acoustic reflection device, 9C-Acoustic reflection device 91Aacoustic reflector, 91B-acoustic reflector, 91C-acoustic reflector 92A-leg, 93A-leg, 94A-cavity,
97-hole, 98-hole SPA-speaker array, ML-microphone array, MR-microphone Array 100-Table,
101A-Speaker, 101B-Speaker 105-Centerline, 106-End, 107-End
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