close

Вход

Забыли?

вход по аккаунту

?

DESCRIPTION JP2017069805

код для вставкиСкачать
Patent Translate
Powered by EPO and Google
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 JP2017069805
Abstract: To provide an on-vehicle acoustic device that controls an output of a sound beam in a
cabin of a vehicle according to the condition of the cabin. A speaker array device (14) having a
speaker array (145) in which a plurality of speakers are arranged is provided on the upper
surface of a dashboard (133) in a cabin of a vehicle. The in-vehicle camera determines the
number of occupants present in the cabin of the vehicle and the positions at which the occupants
are seated. The on-vehicle acoustic device outputs an audio beam by the speaker array device 14
by supplying the input audio signal to some or all of the plurality of speakers of the speaker
array 145 at a timing according to the condition of the occupant. . The sound beam is reflected
by the side window 122 which is a glass member directly or provided in the vehicle to reach the
position of the occupant. [Selected figure] Figure 2
In-vehicle acoustic device
[0001]
The present invention relates to a technology that allows an occupant to listen to the sound of a
voice beam in a vehicle such as a car.
[0002]
There is known a technique of outputting (radiating) a directional audio beam to a listening
position using a speaker array in which a plurality of speakers are arranged.
11-04-2019
1
There are techniques described in Patent Documents 1 and 2 as techniques for facilitating setting
of directivity or output direction of a voice beam.
[0003]
Patent Document 1 describes that a plurality of setting patterns are stored in a memory, and the
directivity of an audio beam to be output to an array speaker is controlled based on the setting
pattern selected by the user. In Patent Document 2, a test sound beam is output while being
rotated from a speaker array, and an output angle of the sound beam is set based on a signal
level of sound data of a sound collected by a microphone installed at a listening position. It is
described.
[0004]
JP, 2006-67218, A Patent 4175420
[0005]
Patent Literatures 1 and 2 propose techniques for setting the directivity or output direction of a
sound beam to a predetermined one listening position.
On the other hand, in the case of a vehicle such as a car, it is often the case that a plurality of
persons are simultaneously present in the cabin. In addition, the number of persons trying to
listen to speech is not always fixed.
[0006]
Furthermore, although the space in which the speaker array device is provided is often the room
space of a facility such as a house, physical characteristics (for example, the shape, size, and
space of the space) of the room space and the cabin of the facility The materials of the wall, floor,
and ceiling to be formed and the articles placed in the space are different, and the acoustic
characteristics (for example, the reflection characteristic and the attenuation characteristic of
sound) are also different accordingly. The present invention has been made under the abovedescribed background, and it is an object of the present invention to control the output of a
11-04-2019
2
sound beam in the cabin of a vehicle according to the situation of the cabin.
[0007]
In order to solve the problems described above, an on-vehicle acoustic device according to the
present invention includes a speaker array having a plurality of speakers installed in a cabin of a
vehicle, a situation determination unit that determines the situation of the cabin, and a
predetermined audio signal. And an audio beam control unit that causes the speaker array to
output an audio beam in accordance with the determined condition of the passenger
compartment. In the present invention, a storage unit for storing a plurality of beam patterns
corresponding to the condition of the vehicle compartment is provided, and the voice beam
control unit reads the beam pattern corresponding to the condition of the vehicle cabin
determined from the storage unit. The sound beam may be output to the speaker array according
to the read beam pattern. In the present invention, the situation determination unit may
determine the situation of the passenger in the vehicle compartment, and the voice beam control
unit may cause the speaker array to output the voice beam according to the determined situation
of the passenger. . In the present invention, a test beam control unit that causes the speaker
array to output a test beam while turning it using a part or all of the plurality of speakers, and a
test beam control unit installed at a predetermined position in the vehicle compartment Sound
characteristic data indicating a correspondence relationship between a sound collection unit that
collects sound of a beam, an angle of the turning, and a level of the sound at the predetermined
position when the test beam is output at the angle, And an acoustic characteristic data storage
unit for storing information for each condition of the passenger compartment, wherein the
condition judging unit determines the level of the sound of the test beam collected by the sound
collection unit and the level of the sound indicated by the acoustic characteristic data. The
situation in the vehicle compartment may be determined by comparing with the above. In the
present invention, the audio beam control unit supplies the first audio signal to a part of the
plurality of speakers, thereby achieving the audio beam reaching the position of the first
occupant at the speaker array. Even when the speaker array is made to output, the speaker array
is made to output the sound beam reaching the position of the second occupant by supplying the
second sound signal to the remaining part or all of the plurality of speakers. Good. In the present
invention, the communication system includes a wireless communication unit that performs
wireless communication with a communication terminal used by a passenger in the vehicle
compartment, and the voice beam control unit is configured to perform the communication
based on data received from the communication terminal by the wireless communication unit.
The speaker array may output the audio beam reaching the position of the occupant. In the
present invention, a speaker device provided in a headrest of a seat of the vehicle, and a multichannel audio signal, an audio signal of a rear channel to the speaker device, an audio signal of a
channel different from the rear channel, the audio An audio signal supply unit for supplying the
11-04-2019
3
beam control unit may be provided.
[0008]
According to the present invention, the output of the sound beam in the cabin of the vehicle can
be controlled according to the situation of the cabin.
[0009]
1 is a perspective view showing a vehicle according to a first embodiment of the present
invention.
It is a perspective view which shows the compartment of the vehicle which concerns on the
embodiment. It is a figure which shows typically the compartment of the vehicle concerning the
embodiment. It is the figure which planarly viewed the compartment of the vehicle which
concerns on the embodiment from right above. It is a front view of the speaker array device
concerning the embodiment. It is a block diagram which shows the structure of the vehiclemounted acoustic apparatus which concerns on the embodiment. It is a block diagram which
shows the function structure of the control part of the vehicle-mounted acoustic apparatus
concerning the embodiment. It is explanatory drawing of the principle of the audio | voice beam
setting by the vehicle-mounted acoustic apparatus which concerns on the embodiment. It is
explanatory drawing of the relationship between the passenger | crew condition in the vehicle
which concerns on the embodiment, and acoustic characteristic data. It is a figure which shows
the audio | voice beam output from the speaker array apparatus which concerns on the
embodiment (when a passenger | crew is one person). It is a figure which shows the audio | voice
beam output from the speaker array apparatus which concerns on the same embodiment (when a
passenger | crew is two people). It is a figure which shows the audio | voice beam output from a
speaker array apparatus after the audio | voice beam setting which concerns on the same
embodiment (when a passenger | crew is four persons). It is a perspective view showing the
compartment of the vehicle concerning the modification of the embodiment. It is a block diagram
which shows the function structure regarding the audio | voice beam setting of the control part
concerning the modification. It is a perspective view showing the compartment of the vehicle
concerning a 2nd embodiment of the present invention. It is the figure which expanded the
periphery of the windshield concerning the embodiment. It is a figure which shows the audio |
voice beam output from the speaker array apparatus based on the embodiment. It is a figure
which shows typically the compartment of the vehicle which concerns on 3rd Embodiment of this
invention. It is the figure which planarly viewed the compartment of the vehicle which concerns
on the embodiment from right above. It is the figure which expanded the periphery of the rear
11-04-2019
4
glass which concerns on the embodiment. It is a figure which shows the audio | voice beam
output from the speaker array apparatus based on the embodiment. It is a figure which shows
typically the compartment of the vehicle which concerns on 4th Embodiment of this invention. It
is a figure which shows the structure of the ceiling of the vehicle which concerns on the
embodiment. It is a figure which shows the audio | voice beam output from the speaker array
apparatus based on the embodiment. It is a figure which shows the structure of the compartment
of the vehicle which concerns on 5th Embodiment of this invention. It is a block diagram which
shows the structure of the vehicle-mounted acoustic apparatus which concerns on the
embodiment. It is a figure which shows the structure of the compartment of the vehicle which
concerns on 6th Embodiment of this invention. It is a sequence diagram which shows the process
which the vehicle-mounted acoustic apparatus which concerns on the embodiment, and a
communication terminal perform. It is explanatory drawing of the other example of installation of
the speaker array apparatus based on the modification 1 of this invention.
[0010]
Hereinafter, embodiments of the present invention will be described with reference to the
drawings. Left and right expressions used in the following description mean left and right toward
the front of the vehicle 100 unless otherwise noted. First Embodiment FIG. 1 is a perspective
view showing a vehicle 100 according to a first embodiment of the present invention. The vehicle
100 is a four-door sedan type automobile. The vehicle 100 is, for example, an electric car or a
hybrid car equipped with a motor and an engine. The vehicle 100 includes a bonnet 101, four
doors 102 serving as an entrance and a trunk door 103 in a vehicle body.
[0011]
FIG. 2 is a perspective view showing the cabin of the vehicle 100. As shown in FIG. The
surroundings of the driver's seat 111 and the passenger seat 112 are shown in FIG. FIG. 3 is a
view schematically showing a compartment of the vehicle 100. As shown in FIG. A door 102 is
provided at the position of the broken line shown in FIG. FIG. 4 is a plan view of the compartment
of the vehicle 100 from directly above. The broken line shown in FIG. 4 means the position of the
rear glass 124.
[0012]
11-04-2019
5
In the vehicle 100, a compartment 120 is formed inside the four doors 102 described in FIG. The
passenger compartment 120 is a space in the vehicle in which a passenger who is a person who
got on the vehicle 100 exists. In the passenger compartment 120, a driver's seat 111, a
passenger's seat 112, and a rear seat 113 are provided as seats on which a passenger sits. Rear
seat 113 is divided into right rear seat 113A at the rear of driver's seat 111 and left rear seat
113B at the rear of passenger seat 112. The position of the occupant in the passenger
compartment 120 is determined by the position of the seat provided in the passenger
compartment 120.
[0013]
The vehicle 100 is provided with a windshield 121, four side windows 122, 123, 125, 126, and a
rear glass 124 as glass members forming the passenger compartment 120. Each of these glass
members is formed with a substantially constant thickness. The front glass 121 is provided in
front of the driver's seat 111 and the passenger's seat 112 at an angle with respect to the
horizontal plane. The rear glass 124 is provided at the rear of the rear seat 113 at an angle to the
horizontal surface. Each of the windshield 121 and the rear glass 124 has a flat shape or a
curved shape in which a central portion protrudes in a direction outside the vehicle. Each of the
side windows 122, 123, 125, 126 is a flat glass member provided on the door 102. The side
window 122 is adjacent to the driver's seat 111, the side window 123 is adjacent to the right
rear seat 113A, the side window 125 is adjacent to the left rear seat 113B, and the side window
126 is adjacent to the assistant seat 112.
[0014]
In front of the driver's seat 111, a steering wheel 131 for adjusting the traveling direction of the
vehicle 100 is provided. At the rear of the rear seat 113, a rear package tray 132 is provided.
The rear package tray 132 is a plate-like member that is provided below the rear glass 124 and
covers a partition that divides the vehicle compartment 120 and the luggage compartment
(trunk) from the vehicle compartment 120 side. In the present embodiment, the lower side
means a direction having a vertically downward component, and the upper side means a
direction having a vertically upward component.
[0015]
11-04-2019
6
A dashboard 133 is provided in front of the driver's seat 111 and the passenger's seat 112 over
the entire vehicle width direction (the width direction of the vehicle 100) of the vehicle interior
120. The dashboard 133 is located below the windshield 121. The dashboard 133 is provided
with an on-vehicle acoustic device 10. The on-vehicle acoustic device 10 is an acoustic device
mounted on the vehicle 100. The in-vehicle acoustic device 10 includes a speaker array device
14 that outputs sound to the passenger compartment 120. Specifically, this voice is a voice beam
generated in the form of a beam by giving directivity.
[0016]
FIG. 5 is a front view of the speaker array device 14. The speaker array device 14 includes a
rectangular parallelepiped housing and a speaker array 145 disposed on the front of the housing.
The speaker array 145 includes a plurality of speakers (speaker units) arranged in a matrix (row
direction and column direction). In the speaker array 145, a plurality of speakers are arranged in
the order of the speakers 145A, 145B, 145C,..., 145P from the left end along the row direction. In
the present embodiment, three speakers arranged in the column direction are represented by any
one of the speakers 145A, 145B, 145C,. The arrangement of the speakers in the speaker array
145 is not limited to the matrix. In the speaker array 145, the speakers may be arranged in
accordance with a predetermined rule such as a honeycomb shape or a line shape. Further, the
number of speakers included in the speaker array 145 is not limited to the number shown in FIG.
[0017]
The speaker array device 14 is provided on the top surface of the dashboard 133 at a position
near the center in the vehicle width direction. The speaker array device 14 is fixed to the
dashboard 133 using, for example, a fixture such as a screw, a magnet or an adhesive. In
addition, the speaker array device 14 is provided with the speaker array 145 directed to the rear
of the vehicle 100, and the output direction of the acoustic beam can be changed within the
range of 0 to 180 degrees on the horizontal surface. In the present embodiment, the output
direction of the voice beam is defined by the “beam output angle”. Specifically, the beam
output angle is specified by an angle formed by the front surface of the speaker array device 14
and the output direction of the sound beam. The speaker array device 14 can also change the
output direction of the acoustic beam within a certain range in the vertical direction.
[0018]
11-04-2019
7
FIG. 6 is a block diagram showing the configuration of the on-vehicle acoustic device 10. As
shown in FIG. The “in-vehicle camera 18” indicated by a broken line in FIG. 6 is a configuration
according to a modification of the present embodiment described later, and the description is
omitted here. The control unit 11 controls each unit of the on-vehicle acoustic device 10. The
control unit 11 is an audio processing circuit exemplified by, for example, a central processing
unit (CPU) as an arithmetic processing unit, a processor including ROM (read only memory), RAM
(random access memory), and DSP (digital signal processor). And a memory exemplified by
EEPROM (Electrically Erasable Programmable).
[0019]
The sound source 12 generates an audio signal. The sound source 12 includes, for example, a
radio tuner, a television tuner, a disc media player, and a digital audio player, and generates an
audio signal in digital form. The sound source 12 may further comprise an external audio input
to which these devices are connected. The control unit 11 supplies an audio signal generated by
the sound source 12 to the speaker array device 14 or the on-vehicle speaker device 15. The
audio signal may represent any sound such as a musical tone or a human voice.
[0020]
The wireless communication unit 13 performs wireless communication with an external
communication terminal. The wireless communication unit 13 performs, for example, near-field
wireless communication conforming to the Bluetooth (registered trademark) standard with the
communication terminal of the occupant.
[0021]
The speaker array device 14 includes an input receiving unit 141, an audio beam control unit
142, D / A converters 143A, 143B, ..., 143P, power amplifiers 144A, 144B, ..., 144P, speakers
145A, 145B, ..., 145P. The input receiving unit 141 is an interface that receives an input of the
audio signal supplied from the control unit 11. The input receiving unit 141 receives, for
example, input of audio signals of two channels or multiple channels (for example, 5.1 channels).
11-04-2019
8
[0022]
The audio beam control unit 142 has a plurality of delay circuits, and causes the speaker array
145 to output a predetermined audio signal input through the input reception unit 141 as an
audio beam. Specifically, the voice beam control unit 142 sends the voice to each speaker of the
speaker array 145 so that the voice beam is generated with the number of voice beams,
directivity, and beam output angle according to the setting by the control unit 11. It controls the
timing (that is, delay time) to supply a signal. In the present embodiment, an audio signal is
supplied to all the speakers of the speaker array 145.
[0023]
The voice beam control unit 142 has a beam pattern storage unit 1421 that stores the beam
pattern in association with the occupant situation. The beam pattern is data indicating a sound
beam pattern that defines, for example, the number of acoustic beams, directivity, and output
direction. The occupant condition is the condition of the occupant in the passenger compartment
120. In the present embodiment, the occupant condition is specified by a combination of the
number of occupants present in the passenger compartment 120 and the seat on which each
occupant is seated. The audio beam control unit 142 reads a beam pattern according to the
occupant's situation from the beam pattern storage unit 1421 and causes the speaker array 145
to output an audio beam according to the read beam pattern. The specific relationship between
the occupant situation and the beam pattern will be described in detail later. Note that the beam
pattern storage unit 1421 may be provided outside the voice beam control unit 142, for example,
the control unit 11.
[0024]
The D / A converters 143A, 143B,..., 143P convert the audio signals supplied from the audio
beam control unit 142 from digital format to analog format. The power amplifiers 144A, 144B,
..., 144P amplify the audio signals supplied from the D / A converters 143A, 143B, ..., 143 at a
predetermined amplification factor. The speakers 145A, 145B,..., 145P convert the audio signals
supplied from the power amplifiers 144A, 144B,.
[0025]
11-04-2019
9
The on-vehicle speaker device 15 is a speaker device provided in the passenger compartment
120 separately from the speaker array device 14. The on-vehicle speaker device 15 includes, for
example, a nondirectional speaker, and is provided on the front surface of the dashboard, a door,
or the like. The microphone 16 is, for example, a nondirectional microphone, and is a sound
collection unit provided in the passenger compartment 120. The microphone 16 converts the
sound collected in the passenger compartment 120 into an audio signal of an analog type (that
is, a collected sound signal). The A / D converter 17 converts the collected voice signal supplied
from the microphone 16 from analog format into digital format, and supplies the converted
signal to the control unit 11.
[0026]
FIG. 7 is a block diagram showing a functional configuration of the control unit 11 of the onvehicle acoustic device 10. As shown in FIG. FIG. 8 is a view for explaining the principle of setting
of the sound beam by the on-vehicle acoustic device 10. As shown in FIG. In FIG. 8 and the other
drawings, the dashed double-dotted arrow means the path and direction in which the sound
beam propagates.
[0027]
The test voice signal generation unit 11A generates a test voice signal. The test audio signal is a
test audio signal used to set an audio beam to be output to the speaker array device 14. The test
audio signal is, for example, an audio signal representing a non-periodic sound centered at 4 kHz
or a non-periodic sound such as noise. The test voice signal generation unit 11A generates a test
voice signal, for example, in response to the operation accepted by the on-vehicle acoustic device
10.
[0028]
The test beam control unit 11B causes the speaker array 145 to output a test beam while turning
it, using a part or all of the speakers of the speaker array 145 based on the test sound signal
supplied from the test sound signal generation unit 11A . The test beam control unit 11B
sequentially or continuously outputs the test beam while changing the beam output angle θ
11-04-2019
10
between 0 and 180 degrees.
[0029]
The sound of the test beam is picked up by the microphone 16. As shown in FIG. 8, the
microphone 16 is provided, for example, near the center of the passenger compartment 120.
However, the sound collection position by the microphone 16 may be set at an arbitrary position
in the passenger compartment 120. In addition, the microphone 16 may be always provided in
the passenger compartment 120, or may be provided only at an opportunity for setting of the
sound beam. The microphone 16 picks up the sound of the test beam that has arrived directly
from the speaker array device 14 or the sound of the test beam reflected by the cabin 120. The
latter test beam mainly reflects any of the side windows 122, 123, 125, 126, and the rear glass
124 as a reflecting surface.
[0030]
In the passenger compartment 120, a space for sound beam propagation is formed between the
driver's seat 111 and the side window 122, between the driver's seat 111 and the assistant's seat
112, and between the assistant's seat 112 and the side window 126. It is done. In addition, a
space for the sound beam to propagate is also formed above the driver's seat 111 and the
passenger seat 112.
[0031]
The acoustic characteristic data storage unit 11C stores acoustic characteristic data. The acoustic
characteristic data is data that defines the correspondence between the beam output angle θ
and the sound level at the collected position when the test beam is output from the speaker array
device 14 at each beam output angle θ for each occupant situation It is. In the following
description, when there is only one passenger (driver) in the driver's seat 111, there are a total of
two passengers in the driver's seat 111 and the passenger's seat 112, and the driver's seat 111
and an assistant Assume that there are three ways when there are a total of four occupants in the
seat 112, the right rear seat 113A, and the left rear seat 113B.
[0032]
11-04-2019
11
FIG. 9 shows an example of the correspondence between the occupant situation and the acoustic
characteristic data. The upper part of FIG. 9 shows the correspondence between one occupant,
the middle one with two occupants, and the lower one with four occupants. In the graph showing
the acoustic characteristic data, the horizontal axis represents the beam output angle θ, and the
vertical axis represents the level (gain) of the sound at the sound collecting position. As shown in
FIG. 9, the beam output angle θ at which the sound level at the sound collection position
becomes the highest is mainly dependent on the shape of the room, and does not change
significantly regardless of the occupant situation. However, the curve showing the relationship
between the beam output angle θ and the level of the sound at the sound collection position
changes depending on the occupant situation. This is because the acoustic characteristics (for
example, the reflection characteristic and the attenuation characteristic of the sound beam) of the
passenger compartment 120 change depending on the number of occupants present in the
passenger compartment 120 and the sitting position. Conversely, it is possible to determine the
occupant condition by measuring the correspondence between the beam output angle θ and the
level of the sound indicated by the collected voice signal using the test beam. The acoustic
characteristics of the passenger compartment 120 indicate characteristics specific to each
vehicle or vehicle type, for example. Therefore, data of acoustic characteristics measured before
shipment of the vehicle 100 may be stored as acoustic characteristics data.
[0033]
Referring back to FIG. The situation determination unit 11D compares the occupant situation by
comparing the level of the test beam indicated by the collected voice signal from the microphone
16 with the level indicated by the acoustic characteristic data stored in the acoustic characteristic
data storage unit 11C. judge. For this determination, the situation determination unit 11D stores
the collected voice signal from the microphone 16 or the level of the voice obtained from the
collected voice signal in association with the beam output angle θ. Then, the situation
determination unit 11D compares the audio level of the test beam with the level indicated by the
acoustic characteristic data prepared for each occupant situation, and determines the occupant
situation based on the degree of similarity between the two. For example, the situation
determination unit 11D calculates the similarity between the curve indicated by the acoustic
characteristic data and the curve indicating the sound level of the test beam measured for a
plurality of beam output angles θ using a known algorithm, The occupant situation is
determined based on the acoustic characteristic data with the highest degree of similarity.
[0034]
11-04-2019
12
The voice beam setting unit 11E sets a voice beam to be output to the speaker array device 14
based on the occupant situation determined by the situation determination unit 11D. For this
setting, the sound beam setting unit 11E stores, for example, setting information of the number
of sound beams, directivity, and beam output angle in association with each of a plurality of
passenger situations. Then, the sound beam setting unit 11E sets the sound beam so that the
position of the occupant present in the passenger compartment 120 is the listening position, and
the sound beam focused on each listening position is output. The audio beam control unit 142 of
the speaker array device 14 performs control for outputting an audio beam according to this
setting.
[0035]
In addition, the sound beam setting unit 11E sets the number of times each sound beam is
reflected by the glass member of the passenger compartment 120 0 times (that is, the sound
beam reaches the listening position directly) once or twice. Is desirable. The audio beam setting
unit 11E may reflect the audio beam, for example, the number of times according to the
operation of the occupant or an audio signal (for example, a sound source) supplied to the
speaker array device 14. The setting of the sound beam described above may be performed at
any timing such as when the vehicle 100 is taken.
[0036]
FIG. 10 is a diagram showing an audio beam when there is only one passenger. In the case shown
in the upper part of FIG. 10, the speaker array device 14 outputs an audio beam that directly
reaches the driver's seat 111 using all the speakers of the speaker array 145. In this case, the
occupant of the driver's seat 111 perceives the arrival of the voice beam from the front of the
driver's seat 111.
[0037]
In the case shown in the middle part of FIG. 10, the speaker array device 14 divides the speakers
of the speaker array 145 into two groups G1 and G2 in the row direction. Then, the speaker
array device 14 uses the speakers of the group G1 to directly reach the driver's seat 111 using
11-04-2019
13
the speakers of the group G2 for the sound beam reflected by the side window 122 to reach the
driver's seat 111. Output In this case, the occupant of the driver's seat 111 perceives the arrival
of the sound beam from his own right and left.
[0038]
In the case shown in the lower part of FIG. 10, the speaker array device 14 uses the speakers of
the group G1, reflects the sound beam reflected by the side window 122 and reaches the driver's
seat 111, using the speakers of the group G2; And an audio beam that is reflected by the side
window 123 and reaches the driver's seat 111. In this case, the occupants of the driver's seat
111 perceive the arrival of the sound beam from their front and rear.
[0039]
FIG. 11 is a diagram showing an audio beam when there are two occupants. In the case shown in
the upper part of FIG. 11, the speaker array device 14 uses the speakers of group G1 to directly
reach the passenger seat 112 using the speakers of group G2. Output In this case, the occupant
of the driver's seat 111 and the occupant of the passenger's seat 112 each perceive the arrival of
the voice beam from the front of the driver.
[0040]
In the case shown in the middle of FIG. 11, the speaker array device 14 divides the speakers of
the speaker array 145 into four equal groups G1 to G4 in the row direction. Then, the speaker
array device 14 uses the speakers of the group G1 to directly reach the driver's seat 111 using
the speakers of the group G2 for the sound beam reflected by the side window 122 to reach the
driver's seat 111. Output Furthermore, the speaker array device 14 uses the speakers of the
group G3 to reflect an audio beam reaching the front passenger seat 112 directly using the
speakers of the group G4 and reflects the sound beam at the side window 126 to reach the
assistant seat 112 Output In this case, the occupants of the driver's seat 111 and the occupants
of the passenger seat 112 perceive the arrival of the sound beam from their left and right.
[0041]
11-04-2019
14
In the case shown in the lower part of FIG. 11, the speaker array device 14 outputs the same
sound beam as that described in the middle part of FIG. 11 using the speakers of the groups G1
and G4. Furthermore, the speaker array device 14 uses the speakers of the group G2 to reflect
the sound beam that is reflected by the rear glass 124 and the side window 123 and reaches the
driver's seat 111 by using the speakers of the group G3. The sound beam reflected by the
window 125 and reaching the driver's seat 111 is output. Each driver of driver's seat 111 and
passenger of passenger seat 112 perceives the arrival of the sound beam from his own right and
left.
[0042]
FIG. 12 is a diagram showing an audio beam when there are four occupants. In the case shown in
the upper part of FIG. 12, the speaker array device 14 divides the speakers of the speaker array
145 into four equal groups G1 to G4 and uses the speakers of group G1 to group voice beams
that directly reach the driver's seat 111 A voice beam reaching the front passenger seat 112
directly using the speaker of G2 is a voice beam reaching directly to the right rear seat 113A
using the speaker of the group G3 a left rear seat 113B using the speaker of the group G4 Output
an audio beam that directly reaches In this case, each of the four occupants perceives the arrival
of the voice beam from their front.
[0043]
In the case shown in the lower part of FIG. 12, the speaker array device 14 divides the speakers
of the speaker array 145 into four equal groups G1 to G4, reflects the light from the side window
122 using the speakers of the group G1, and reaches the driver's seat 111 Sound beam is
reflected by the side window 123 using the speaker of the group G2 and reaches the right rear
seat 113A is reflected by the side window 125 using the speaker of the group G3 and the left
rear seat 113B The sound beam reaching the light emitting side is reflected by the side window
126 using the speaker of the group G4, and the sound beam reaching the passenger seat 112 is
output. In this case, each of the four occupants perceives the arrival of an audio beam from the
direction of the side window adjacent to their seat. The speaker array device 14 may not output
an audio beam reaching a position of the occupant for some of the occupants. Also, the speaker
array device 14 may generate a plurality of audio beams using all the speakers of the speaker
array 145 without grouping the speakers of the speaker array 145. This content is the same in
the following description.
11-04-2019
15
[0044]
Referring back to FIG. The audio signal supply unit 11F supplies the audio signal generated by
the sound source 12 to the speaker array device 14 or the on-vehicle speaker device 15. At this
time, the audio signal supply unit 11F selects the speaker array device 14 as the audio signal
supply destination after setting of the audio beam.
[0045]
When the speaker array device 14 is selected, the audio signal supply unit 11F supplies an
acoustic signal to the speaker array device 14 so that an audio beam generated based on the
same acoustic signal is output to all the occupants. The acoustic signal may be supplied to the
speaker array device 14 so as to output an audio beam generated based on different acoustic
signals depending on the occupant. In the latter case, the audio beam control unit 142 of the
speaker array device 14 supplies the input first audio signal to a part of the speakers of the
speaker array 145 so that the audio reaches the position of the first occupant. A second audio
signal different from the first passenger by outputting a beam and supplying a second audio
signal different from the input first audio signal to some or all of the remaining speakers of the
speaker array 145; The voice beam reaching the position of the occupant is output.
[0046]
The audio signal supply unit 11F may supply the speaker array device 14 with an audio signal
obtained by downmixing multi-channel audio signals.
[0047]
As in the first embodiment described above, the speaker array device 14 outputs an audio beam
to be heard by the occupant of the vehicle 100 using the structure of the passenger
compartment 120.
Furthermore, the in-vehicle acoustic device 10 can output an audio beam that directly or reflects
in the passenger compartment 120 and reaches the position of each occupant depending on the
occupant's situation. Since the setting of the sound beam is performed by the method using the
11-04-2019
16
test beam, the passenger is not forced to perform troublesome operations regarding the setting
of the sound beam.
[0048]
<Modification of First Embodiment> (1) The determination of the occupant condition may be
performed by a method other than the method using the test beam. For example, the control unit
11 may determine the occupant status using the image of the passenger compartment 120
captured by the in-vehicle camera 18. As shown in FIG. 13, the in-vehicle camera 18 is provided
at a position at which at least each seat in the passenger compartment 120 can be imaged, and is
provided on the upper surface of the speaker array device 14 here. However, the in-vehicle
camera 18 may be provided at another position.
[0049]
FIG. 14 is a diagram showing a functional configuration of the control unit 11 of the on-vehicle
acoustic device 10 regarding setting of the sound beam of this modification. The situation
determination unit 11G determines the occupant situation based on the image of the passenger
compartment 120 captured by the in-vehicle camera 18. The situation determination unit 11G
recognizes, for example, the face of a person included in the image of the passenger
compartment 120, and specifies the number of occupants present in the passenger compartment
120 and the positions at which each occupant is seated.
[0050]
The voice beam setting unit 11H sets a voice beam to be output to the speaker array device 14
based on the occupant situation determined by the situation determination unit 11G. This setting
may be performed in the same manner as in the first embodiment described above.
[0051]
The determination of the occupant situation may be performed in yet another way. The control
unit 11 may perform pairing with the communication terminal used by the occupant via the
11-04-2019
17
wireless communication unit 13 and determine the number of communication terminals whose
pairing has been completed as the number of occupants. Then, the control unit 11 determines
one of the occupant situations described in FIG. 9 according to the number of occupants. In
addition, the control unit 11 may determine the occupant status based on the operation received
by the on-vehicle acoustic device 10.
[0052]
(2) The acoustic characteristics of the passenger compartment 120 change not only according to
the occupant condition but also depending on the condition of the arrangement of articles such
as luggage. The status of the placement of the article is specified, for example, by one or more of
the position, the size, and the number at which the article is placed. Therefore, the on-vehicle
acoustic device 10 may output an audio beam according to the condition of the passenger
compartment 120 using the speaker array device 14. Here, the condition of the vehicle
compartment 120 includes at least one of a passenger condition and a condition of arrangement
of articles in the vehicle compartment 120.
[0053]
As described in FIG. 8, the beam output angle θ at which the sound level at the sound collection
position is highest is mainly dependent on the shape of the room, and thus does not change
significantly regardless of the condition of the vehicle interior 120. Therefore, the vehiclemounted acoustic device 10 can determine the condition of the vehicle compartment 120 by
measuring the correspondence between the beam output angle θ and the level of the sound
indicated by the collected voice signal using the test beam. is there. The configuration for this
determination can be described by replacing the “occupant status” of the above-described first
embodiment with “the status of the passenger compartment 120”. For example, as the
acoustic characteristic data, the acoustic characteristic data storage unit 11C corresponds to the
beam output angle θ and the sound level at the sound collection position when the test beam is
output from the speaker array device 14 at each beam output angle θ. The relationship is stored
as data defined for each situation of vehicle compartment 120. Then, the situation determination
unit 11D compares the level of the test beam voice indicated by the collected voice signal from
the microphone 16 with the level indicated by the acoustic characteristic data stored in the
acoustic characteristic data storage unit 11C. The situation of the room 120 is determined. The
sound beam setting unit 11E sets a sound beam to be output to the speaker array device 14
based on the condition of the passenger compartment 120 determined by the condition
determination unit 11D. According to the in-vehicle acoustic device 10 of this modified example,
11-04-2019
18
it is possible to determine the more detailed situation of the passenger compartment 120, such
as a luggage placed on the rear seat 113.
[0054]
Second Embodiment Next, a second embodiment of the present invention will be described. In
the second embodiment, the orientation of the speaker array 145 is different from that of the
first embodiment described above. In this embodiment, elements given the same reference
numerals as those in the first embodiment described above are the same as those in the first
embodiment described above.
[0055]
FIG. 15 is a perspective view showing a passenger compartment 120 of the present embodiment.
FIG. 16 is an enlarged view of the periphery of the windshield 121. As shown in FIG. As shown in
FIG. 15, the speaker array device 14 is provided with the speaker array 145 directed upward. To
that end, in the speaker array device 14, for example, a housing is provided inside the dashboard
133 such that the speaker array 145 is located at an opening opened in the dashboard 133. The
speaker array device 14 is installed so that the row direction in which the speakers of the
speaker array 145 are arranged is along the vehicle width direction.
[0056]
With such an installation, the sound beam output from the speaker array device 14 is reflected
by the windshield 121 as shown in FIG. Since the windshield 121 is inclined with respect to the
horizontal plane, the sound beam reflected by the windshield 121 propagates from the front to
the rear of the vehicle 100 in the passenger compartment 120. In addition, by controlling the
output direction of the sound beam, the speaker array device 14 outputs the sound beam
reaching the driver's seat 111 and the passenger seat 112 (see arrow R1 in FIG. 16) or reaches
the rear seat 113. Audio beam (see arrow R2 in FIG. 16). Also in this embodiment, the setting of
the sound beam is performed in the same manner as in the first embodiment described above.
[0057]
11-04-2019
19
FIG. 17 is a view showing an audio beam output from the speaker array device 14. In the upper
part of FIG. 17, the sound beam in the case of one passenger is shown. In this case, the speaker
array device 14 outputs an audio beam that is reflected by the windshield 121 and reaches the
driver's seat 111 using all the speakers. In the middle of FIG. 17, the sound beam in the case of
two occupants is shown. In this case, the speaker array device 14 equally divides the speakers of
the speaker array 145 into the group G1 and the group G2, and uses the speakers of the group
G1 to reflect on the windshield 121 to reach the driver's seat 111 , And a speaker of group G2 to
output an audio beam that is reflected by the windshield 121 and reaches the passenger seat
112. In the lower part of FIG. 17, the sound beam in the case of four occupants is shown. In this
case, the speaker array device 14 equally divides the speakers of the speaker array 145 into four
groups G1 to G4 and reflects the sound from the windshield 121 to the driver's seat 111 using
the speakers of the group G1. An audio beam reflected by the windshield 121 and reaching the
right rear seat 113A using the speakers of the group G2 is reflected by the windshield 121 using
the speakers of the group G3 to reach the left rear seat 113B The beam is reflected by the
windshield 121 using a group G 4 speaker to output an audio beam reaching the passenger seat
112.
[0058]
According to the vehicle-mounted acoustic device 10 of the second embodiment described above,
the reflection of the sound beam at the windshield 121 can be used to output the sound beam
reaching the position of the occupant. In addition, if the windshield 121 has a curved shape in
which the central portion protrudes in the direction outside the vehicle, there is a possibility that
the shape of the windshield 121 can be used to generate an audio beam with more directivity.
[0059]
Third Embodiment Next, a third embodiment of the present invention will be described. In the
third embodiment, the speaker array device 14 is provided at the rear of the rear seat 113, more
specifically, at the rear package tray 132. In this embodiment, elements given the same reference
numerals as those in the first embodiment described above are the same as those in the first
embodiment described above.
[0060]
11-04-2019
20
FIG. 18 schematically shows a compartment 120 of the vehicle 100. As shown in FIG. FIG. 19 is a
plan view of the passenger compartment 120 from directly above. FIG. 20 is an enlarged view of
the area around the rear glass 124. The speaker array device 14 is provided on the upper surface
of the rear package tray 132 at a position near the center in the vehicle width direction. In
addition, the speaker array device 14 is provided with the speaker array 145 directed upward. To
that end, in the speaker array device 14, for example, a housing is provided below the rear
package tray 132 such that the speaker array 145 is located at an opening opened in the rear
package tray 132. The speaker array device 14 is installed so that the row direction in which the
speakers of the speaker array 145 are arranged is along the vehicle width direction.
[0061]
The sound beam output from the speaker array device 14 is reflected by the rear glass 124 as
shown in FIG. Since the rear glass 124 is inclined with respect to the horizontal plane, the sound
beam reflected by the rear glass 124 propagates from the rear to the front of the vehicle 100 in
the passenger compartment 120. In addition, the speaker array device 14 can output an audio
beam reaching the driver's seat 111 and the assistant's seat 112 by controlling the output
direction of the audio beam. Also in this embodiment, the setting of the sound beam is performed
in the same manner as in the first embodiment described above.
[0062]
FIG. 21 is a diagram showing an audio beam output from the speaker array device 14. In the
upper part of FIG. 21, the sound beam in the case of one passenger is shown. In this case, the
speaker array device 14 outputs an audio beam that is reflected by the rear glass 124 and
reaches the driver's seat 111 using all the speakers. In the lower part of FIG. 21, the sound beam
in the case of two occupants is shown. In this case, the speaker array device 14 equally divides
the speakers of the speaker array 145 into the group G1 and the group G2, and uses the
speakers of the group G1 to reflect the sound beam reflected by the rear glass 124 and reach the
driver's seat 111 The speaker of the group G2 is used to output an audio beam that is reflected
by the rear glass 124 and reaches the front passenger seat 112. Although not shown, the speaker
array device 14 can also output an audio beam reaching the rear seat 113 by controlling the
output direction of the audio beam.
[0063]
11-04-2019
21
According to the vehicle-mounted acoustic device 10 of the third embodiment described above,
the reflection of the sound beam at the rear glass 124 can be used to output the sound beam
reaching the position of the occupant. Further, if the rear glass 124 has a curved shape in which
the central portion protrudes in the direction outside the vehicle, there is a possibility that the
shape of the rear glass 124 can be used to generate an audio beam with more directivity.
[0064]
Fourth Embodiment Next, a fourth embodiment of the present invention will be described. In the
fourth embodiment, the speaker array device 14 is provided on the ceiling of the passenger
compartment 120. In this embodiment, elements given the same reference numerals as those in
the first embodiment described above are the same as those in the first embodiment described
above.
[0065]
FIG. 22 is a view schematically showing a compartment of vehicle 100. Referring to FIG. FIG. 23
is a view showing the configuration of the ceiling of the vehicle 100. As shown in FIG. FIG. 23 is a
plan view of the ceiling of the vehicle 100 in the arrow Y direction (directly above). The speaker
array device 14 is provided on the ceiling 134. For example, the housing of the speaker array
device 14 is provided in the space between the head lining and the roof panel. In the present
embodiment, the speaker array device 14 is provided with the speaker array 145 directed
downward one by one above the right rear seat 113A and above the left rear seat 113B. The
speakers of the speaker array 145 are arranged along the front-rear direction of the vehicle 100.
Thus, the speaker array device 14 can control the output direction of the sound beam in the
front-rear direction of the vehicle 100. Also in this embodiment, the setting of the sound beam is
performed in the same manner as the first embodiment described above.
[0066]
FIG. 24 is a diagram showing an audio beam output from the speaker array device 14. FIG. 24
shows an audio beam output from the speaker array device 14 provided above the right rear seat
113A. In the case shown in the upper part of FIG. 24, the speaker array device 14 reaches the
11-04-2019
22
driver's seat 111 by reflecting on an audio beam (see arrow R3) that directly reaches the driver's
seat 111 or using the windshield 121 using all the speakers. Output an audio beam (see arrow
R4). In the case of the voice beam indicated by the arrow R3, the occupant of the driver's seat
111 perceives that the voice beam has arrived from the rear, and in the case of the voice beam
indicated by the arrow R4, the voice beam has arrived from the front To perceive things.
[0067]
In the case shown in the lower part of FIG. 24, the speaker array device 14 divides the speakers
of the speaker array 145 into two equal groups G1 and G2, and uses the speakers of group G1 to
directly reach the right rear seat 113A. Is output using the speakers of the group G 2, or an audio
beam that is reflected by the windshield 121 and reaches the driver's seat 111. The speaker
array device 14 provided above the left rear seat 113B outputs an audio beam reaching the front
passenger seat 112 and / or the left rear seat 113B in the same manner as the method described
in FIG.
[0068]
According to the vehicle-mounted acoustic device 10 of the fourth embodiment described above,
the speaker array device 14 provided on the ceiling 134 can be used to output an audio beam
reaching the position of the occupant. When the speaker array device 14 is provided on the
ceiling 134, the articles provided in the passenger compartment 120 are unlikely to impede the
propagation of the sound beam.
[0069]
Fifth Embodiment Next, a fifth embodiment of the present invention will be described. In the fifth
embodiment, the on-vehicle acoustic device 10 causes the passenger to listen to the voice by the
control in which the speaker array device 14 and the on-vehicle speaker device 15 are combined.
In this embodiment, elements given the same reference numerals as those in the first
embodiment described above are the same as those in the first embodiment described above.
[0070]
11-04-2019
23
FIG. 25 is a plan view of the passenger compartment 120 from directly above. As shown in FIG.
25, the right rear speaker 151R and the left rear speaker 151L are provided in the headrest of
the right rear seat 113A. In the headrest of the left rear seat 113B, a right rear speaker 152R and
a left rear speaker 152L are provided. Each of these speakers is, for example, a nondirectional
speaker, and outputs a voice to an occupant seated in a seat. For this reason, the occupant seated
in the right rear seat 113A or the left rear seat 113B can perceive the arrival of the sound from
behind on the left and right.
[0071]
FIG. 26 is a block diagram showing the configuration of the on-vehicle acoustic device 10 of the
present embodiment. When a multi-channel audio signal is input, the control unit 11 (audio
signal supply unit 11F) transmits the audio signal of the rear channel to the on-vehicle speaker
device 15 and the audio signal of a channel different from the rear channel to the speaker array
device 14 Supply to When a multi-channel audio signal of 5.1 channel is input, the control unit
11 controls the audio signal SL of the rear left channel to the left rear speakers 151L and 152L,
the audio signal SR of the rear right channel, and the right side. It supplies the rear speakers
151R and 152R. Further, the control unit 11 supplies the center channel C, the audio signal FL of
the front left channel, and the audio signal FR of the front right channel to the speaker array
device 14 (audio beam control unit 142).
[0072]
The sound beam output from the speaker array device 14 will be described with reference to FIG.
The speaker array device 14 divides the speakers of the speaker array 145 into four equal
groups G1 to G4. The speaker array device 14 uses the speakers of the group G1 and reflects the
sound beam reflected by the side window 123 to the right ear of the occupant of the right rear
seat 113A using the speakers of the group G2 It outputs an audio beam that directly reaches the
left ear of the 113A occupant. In addition, the speaker array device 14 reflects the sound beam
that directly reaches the right ear of the occupant of the left rear seat 113B by using the
speakers of the group G3, reflects the side window 125 by using the speakers of the group G4,
and A voice beam reaching the left ear of the occupant of the seat 113B is output.
[0073]
11-04-2019
24
Thus, the occupant seated in the rear seat 113 perceives the arrival of the sound of the front
channel and the center channel from the front and the arrival of the sound of the rear channel
from the rear. For this reason, according to the on-vehicle acoustic device 10 of the present
embodiment, it is possible to make a passenger perceive multi-channel audio by combining the
speaker array device 14 and the on-vehicle speaker device 15.
[0074]
The control unit 11 may adjust the amplification factor of the power amplifiers 144A, 144B,...,
144P in the speaker array device 14 so as to compensate for the level of sound at the listening
position. Further, the right rear speaker and the left rear speaker described in the present
embodiment may be provided in the head rest of the driver's seat 111 and the passenger seat
112.
[0075]
Sixth Embodiment Next, a sixth embodiment of the present invention will be described. In the
sixth embodiment, the on-vehicle acoustic device 10 performs wireless communication with the
communication terminal used by the occupant, and outputs a voice beam corresponding to the
data received from the communication terminal so as to reach the position of the occupant. FIG.
27 is a plan view of the cabin of the vehicle 100 from directly above. As shown in FIG. 27, the
occupant seated on the right rear seat 113A uses the communication terminal 20 here. Although
the communication terminal 20 is a smartphone here, it may be a communication terminal
having a wireless communication function such as a mobile phone or a tablet computer. For
example, when the communication terminal 20 makes a call, the on-vehicle acoustic device 10
has a function of outputting from the speaker array device 14 a reception voice related to the
call.
[0076]
FIG. 28 is a sequence diagram showing processing performed by the in-vehicle acoustic device
10 and the communication terminal 20. The control unit 11 of the in-vehicle acoustic device 10
pairs the communication terminal 20 via the wireless communication unit 13 (step S1). When a
call is started in the communication terminal 20 (step S2), the control unit 11 receives an audio
11-04-2019
25
signal representing a reception voice from the communication terminal 20 via the wireless
communication unit 13 (step S3). The control unit 11 supplies the received audio signal to the
speaker array device 14 to cause the speaker array device 14 to convert the received voice into
an audio beam (step S4). Here, the control unit 11 controls the speaker array device 14 to
generate an audio beam that reaches the position of the occupant using the communication
terminal 20. The position of the passenger who makes a call may be, for example, a
predetermined position in the passenger compartment 120, or may be specified by the operation
of the communication terminal 20 or the passenger on the in-vehicle acoustic device 10. Then, as
shown in FIG. 27, the speaker array device 14 causes the speaker array 145 to output the
generated voice beam of the received voice so as to reach the position of the occupant (step S5).
[0077]
According to the on-vehicle acoustic device 10 of the sixth embodiment described above, an
occupant using the communication terminal 20 can make a hands-free call using the
communication terminal 20. Further, as shown in FIG. 27, since the call voice is beamed, it is
difficult for other crew members to listen to the call voice. In addition, the on-vehicle acoustic
device 10 can also generate an audio beam based on another audio signal for the occupants
other than the occupant in a call to listen to the audio.
[0078]
In the present embodiment, the case of converting received voice into voice beam has been
described. However, the on-vehicle acoustic device 10 may receive data other than the voice
signal of received voice from the communication terminal 20 and output the voice beam. For
example, the in-vehicle acoustic device 10 receives data of content (for example, audio content)
reproduced by the communication terminal 20, converts the audio of the content into an audio
beam, and reaches the position of the occupant using the communication terminal 20 It may be
output as
[0079]
[Modification] The present invention can be implemented in a form different from the abovedescribed embodiment. The present invention can also be implemented, for example, in the
following modes. Moreover, the modifications shown below may combine each suitably.
11-04-2019
26
(Modification 1) The position where the speaker array device 14 is provided, and the orientation
of the speaker array 145 are not limited to the position and orientation described in the above
embodiment, and may be, for example, as described below. FIG. 29 is a view for explaining
another example of the installation of the speaker array device 14. The speaker array device 14
may be provided, for example, on a pillar which is a window post of the vehicle 100. In the
example of FIG. 29, the speaker array device 14 is provided on each of the front pillar 135 and
the center pillar 136. In this case, the speakers of the speaker array 145 are arranged along the
extension direction of the pillars. The on-vehicle acoustic device 10 uses, for example, the
speaker array device 14 of the front pillar 135 to transmit an audio beam reaching the driver's
seat 111 or the passenger seat 112 to the rear seat 113 using the speaker array device 14 of the
center pillar 136. Outputs an arriving voice beam.
[0080]
The speaker array device 14 may be provided on the handle 131. In FIG. 29, a speaker array
device 14 is provided on a substantially circular ring shaped steering wheel (handle portion) of
the handle 131. The speakers of the speaker array 145 are annularly arranged along the steered
wheels. Then, the on-vehicle acoustic device 10 uses the speaker array device 14 provided on the
steering wheel 131 to output an audio beam reaching the driver's seat 111.
[0081]
(Modification 2) The control unit 11 of the on-vehicle acoustic device 10 may cause the speaker
array device 14 to output the sound beam while turning it. For example, when the in-vehicle
acoustic device 10 has a car navigation function, the speaker array device 14 turns to the driver's
seat 111 and turns from left to right as viewed from the occupant when outputting an audio
beam guiding right turn Output an audio beam like this. On the other hand, when outputting an
audio beam guiding a left turn, the speaker array device 14 outputs an audio beam that turns
from the right to the left as viewed from the occupant toward the driver's seat 111. As a result,
the occupant of the driver's seat 111 can easily grasp the content guided by voice intuitively.
Also, the control unit 11 may control the output of the sound beam of the speaker array device
14 so that the occupant perceives the arrival of the sound beam from the direction in which the
destination is present.
[0082]
11-04-2019
27
(Modification 3) The control unit 11 of the in-vehicle acoustic device 10 may output an audio
beam to the speaker array device 14 in cooperation with an image display device (for example, a
liquid crystal monitor) provided in the passenger compartment 120. For example, behind the
driver's seat 111 and the assistant's seat 112, there may be a case where a video display device
for an occupant seated in the rear seat 113 is provided. In this case, the control unit 11 of the invehicle acoustic device 10 outputs an audio beam reaching the right rear seat 113A based on the
audio signal of the content used for video display in the video display device provided behind the
driver's seat 111 Control the speaker array device 14 to output an audio beam reaching the left
rear seat 113B based on the audio signal of the content used for video display in the video
display device provided behind the passenger seat 112 .
[0083]
(Modification 4) The configurations of the on-vehicle acoustic device 10 described in the first to
sixth embodiments may be combined as appropriate. For example, the speaker array devices 14
may be provided at a plurality of positions in the passenger compartment 120. The member
which becomes a reflective surface which reflects an audio | voice beam is not restricted to the
glass member provided in the vehicle 100. FIG. The in-vehicle acoustic device 10 may output an
audio beam reflected by a member (a wall, a ceiling, a wall, an interior product, or the like) other
than the glass member to form the vehicle compartment 120 using the speaker array device 14.
The on-vehicle acoustic device 10 may output the audio beam using only some of the speakers
instead of outputting the audio beam using all of the speakers included in the speaker array 145
of the speaker array device 14.
[0084]
(Modification 5) The vehicle of the present invention is not particularly limited in form (body
shape) and type of power source. The vehicle of the present invention may be, for example, a
roofless vehicle or a roofable vehicle. The vehicle of the present invention includes a vehicle
traveling for the purpose of transporting an occupant such as a train or a bus, and a vehicle not
intended for transportation of a passenger such as a playground equipment. The vehicle of the
present invention includes a vehicle in which no seat is provided at a position where an occupant
is present.
[0085]
11-04-2019
28
The functions implemented by the control unit 11 of the on-vehicle acoustic device 10 of the
above-described embodiment may be implemented by combining a plurality of programs or may
be implemented by linking a plurality of hardware resources. When the function of the control
unit 11 is realized using a program, this program is a magnetic recording medium (magnetic
tape, magnetic disk (HDD (Hard Disk Drive), FD (Flexible Disk), etc.)), optical recording medium
(optical disk) And the like, may be provided as stored in a computer-readable recording medium
such as a magneto-optical recording medium, a semiconductor memory, etc., or may be
distributed via a network.
[0086]
DESCRIPTION OF SYMBOLS 10 Vehicle-mounted acoustic apparatus 11 Control part 11A Test
voice signal generation part 11B Test beam control part 11C Acoustic characteristic data storage
part 11D, 11G Situation determination part 11E 11H Speech beam setting part , 11F: audio
signal supply unit, 12: sound source, 13: wireless communication unit, 14: speaker array device,
15: in-vehicle speaker device, 151L, 152L: left rear speaker, 151R, 152R: right rear speaker, 16:
microphone, 17: A / D converter, 18: camera in the car, 100: vehicle, 111: driver seat, 112:
passenger seat, 113: rear seat, 113A: right rear seat, 113B: left rear seat, 121: windshield, 122,
123, 125, 126 ... side window, 124 ... rear glass, 131 ... handle, 132 ... rear package Tray, 133:
dashboard, 134: ceiling, 135: front pillar, 136: center pillar, 141: input reception unit, 142: voice
beam control unit, 1421: beam pattern storage unit, 143A, 143B,. ... D / A converter, 144A,
144B, ..., 144P ... Power amplifier, 145 ... Speaker array, 145A, 145B ... ... 145P ... Speaker, 20 ...
Communication terminal
11-04-2019
29
Документ
Категория
Без категории
Просмотров
0
Размер файла
47 Кб
Теги
description, jp2017069805
1/--страниц
Пожаловаться на содержимое документа