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JP2015226147

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DESCRIPTION JP2015226147
An alarm sound of an emergency vehicle or the like outside the vehicle can be surely notified to
the driver and the driver can intuitively recognize in which direction the sound source of the
alarm sound is with respect to the host vehicle. Provided is an on-vehicle acoustic device. A
sound acquisition unit (11) for acquiring an alarm sound external to a vehicle and an azimuth
calculation unit for calculating in which direction the sound source of the acquired alarm sound
is located with respect to the vehicle 12 and an output control unit 13 for instructing the speaker
in the direction in which the sound source of the alarm sound is to output alarm sound
notification sound based on the calculated direction, such as an emergency vehicle outside the
vehicle The warning sound can be notified to the driver with certainty, and the driver can
intuitively recognize in which direction the sound source of the warning sound is with respect to
the host vehicle. [Selected figure] Figure 1
Automotive audio equipment
[0001]
The present invention relates to an on-vehicle acoustic device mounted on a vehicle such as a car.
[0002]
Conventionally, in a vehicle such as a car, when the volume of an audio sound or the like in the
vehicle is large, the alarm sound of an emergency vehicle or the like outside the vehicle may not
be confirmed, which may lead to an accident or a problem. .
09-05-2019
1
[0003]
In order to cope with such a problem, as a means for detecting an alarm sound and notifying the
driver with information by voice, audio voice etc. is continuously flowed from other speakers
than the driver's speaker. There is known a device that generates voice information on alarm
sound only from a driver's speaker (see, for example, Patent Documents 1 and 2).
[0004]
JP-A-7-131882 JP-A-2006-295443
[0005]
However, in the conventional apparatus as shown in, for example, Patent Documents 1 and 2,
etc., the information about the alarm sound is generated only from the driver's side speaker, so
the information can be made easy to hear, but the sound source of the alarm sound It is difficult
to instantly recognize in which direction the driver's vehicle is located and it is possible to give
sufficient information to the driver in situations where the vehicle in motion must avoid an
emergency vehicle etc. Had a problem of not having
[0006]
The present invention has been made to solve the problems as described above, in which the
driver is surely notified of an alarm sound of an emergency vehicle or the like outside the vehicle,
and the sound source of the alarm sound is transmitted to the own vehicle It is an object of the
present invention to provide an on-vehicle acoustic device capable of making a driver intuitively
recognize whether the vehicle is in an azimuth.
[0007]
In order to achieve the above object, in the vehicle-mounted acoustic device according to the
present invention, a sound acquisition unit for acquiring an alarm sound outside the vehicle and
a sound source of the alarm sound acquired by the sound acquisition unit An output for giving an
instruction to output an alarm sound notification sound to a speaker in a direction in which the
sound source of the alarm sound is based on an azimuth calculation unit that calculates whether
it is in an azimuth and the azimuth calculated by the azimuth calculation unit And a control unit.
[0008]
According to the present invention, when notifying the driver of an alarm sound such as an
emergency vehicle or alarm outside the vehicle, using the front, rear, left, and right speakers in
the car, the alarm sound from the speaker in the direction of the sound source By outputting a
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2
notification sound, the driver is surely notified of an alarm sound of an emergency vehicle or the
like outside the vehicle, and the driver intuitively recognizes in which direction the sound source
of the alarm sound is with respect to the host vehicle It can be done.
[0009]
FIG. 1 is a block diagram showing an example of a vehicle-mounted acoustic device in a first
embodiment.
5 is a flowchart showing processing of the in-vehicle acoustic device in the first embodiment.
FIG. 8 is a block diagram showing another example of the in-vehicle acoustic device in the first
embodiment.
FIG. 6 is a diagram showing a specific configuration example in the case where the in-vehicle
acoustic device in Embodiment 1 is applied to a car audio.
[0010]
Hereinafter, embodiments of the present invention will be described in detail with reference to
the drawings.
Embodiment 1
FIG. 1 is a block diagram showing an example of a vehicle-mounted acoustic device in accordance
with Embodiment 1 of the present invention.
The on-vehicle acoustic device 10 includes a voice acquisition unit 11, a direction calculation unit
12, and an output control unit 13. Here, a car audio will be described as an example.
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[0011]
The sound acquisition unit 11 acquires alarm sounds outside of the vehicle, such as siren sounds
of an emergency vehicle and an alarm, etc. collected by the microphone 1 and horns of other
vehicles in the vicinity.
At this time, the analog signal collected by the microphone 1 is converted into a digital signal
through the A / D converter and acquired.
The voice acquisition unit 11 also obtains voice data from a voice source in the on-vehicle
acoustic device 10.
[0012]
In addition, if the microphone 1 is omnidirectional (directivity in all directions), it is sufficient to
have one in the host vehicle, but if it is a unidirectional microphone, left front, right front, At least
four microphones may be provided at the left rear and the right rear.
[0013]
The direction calculation unit 12 takes in the alarm sound acquired by the sound acquisition unit
11, and in which direction the sound source is located with respect to the vehicle, that is, from
which direction the vehicle is approaching or in which direction Calculate the direction of
separation.
Further, in addition to the calculation of the direction, the direction calculation unit 12
approaches the sound source of the alarm sound to the vehicle or based on the vehicle side based
on the volume of the alarm sound acquired by the sound acquisition unit 11. Determine the
separation.
[0014]
Based on the direction calculated by the direction calculation unit 12, the output control unit 13
separates the speaker in the direction in which the sound source of the alarm sound is, that is,
the direction in which the sound source approaches the vehicle or from the vehicle side. An
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instruction to output alarm sound notification sound to the speakers in one direction (one of 2 to
5), and the speaker in the other direction is an audio source that has been heard as a car audio
Give instructions to continue to output voice data from.
[0015]
In FIG. 1, the speaker 2 is a left front speaker of the vehicle, the speaker 3 is a right front
speaker, the speaker 4 is a left rear speaker, and the speaker 5 is a right rear speaker.
[0016]
Here, the processing of the in-vehicle acoustic device 10 will be described using the flowchart
shown in FIG.
FIG. 2 is a flowchart showing processing of the in-vehicle acoustic device 10 according to the
first embodiment.
[0017]
First, when the voice acquiring unit 11 acquires an alarm sound outside the vehicle, such as a
siren of an emergency vehicle such as a police car or an ambulance, or a hornion from another
surrounding vehicle (in the case of YES in step ST1), The direction calculation unit 12 calculates
the direction as to which direction the sound source of the alarm sound is with respect to the
vehicle, that is, from which direction the vehicle is approaching or away from the vehicle ( Step
ST2).
[0018]
For example, when the siren of the ambulance approaches from the rear right of the vehicle, the
direction calculation unit 12 calculates that the sound source of the alarm sound is approaching
from the rear right.
Then, based on the direction calculated by the direction calculation unit 12, the output control
unit 13 separates from the speaker in the direction in which the sound source of the alarm sound
is, that is, the direction approaching the vehicle or the vehicle side. An instruction is given to the
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5
speaker in the approaching direction or the separating direction so that the alarm sound
notification sound is output from the speaker in the direction (step ST3).
[0019]
That is, when the siren of the ambulance approaches from the rear right of the vehicle, the
output control unit 13 instructs the right rear speaker 5 to output an alarm sound notification
sound from the right rear speaker 5 I do.
[0020]
Here, as the alarm sound notification sound, a constant alarm sound such as an alarm or siren
may be output regardless of the type of emergency vehicle, or the frequency etc. based on the
sound acquired by the sound acquisition unit 11 From this, the type of emergency vehicle may
be determined, and a siren sound similar to that of a police car siren or an ambulance siren may
be output.
In addition, for example, a voice including an explanation such as "emergency vehicle is
approaching" may be output.
[0021]
In addition, the output control unit 13 is a speaker in a direction other than the direction in
which the sound source of the alarm sound is, that is, a speaker in a direction approaching the
vehicle or a direction other than the direction separating from the vehicle side. On the other
hand, an instruction is issued to continue to output voice data from a voice source which has
been heard as car audio (step ST4).
[0022]
That is, in this case, to the other speakers 2, 3 and 4 other than the speaker 5 on the right rear
where the sound source of the alarm sound is approaching, it is instructed to continue to output
the audio data from the audio source heard as car audio. I do.
[0023]
Thus, when notifying the driver of an alarm sound such as an emergency vehicle or alarm outside
the vehicle, using the front, rear, left, and right speakers in the car, the alarm sound is notified
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6
from the speaker in the direction of the sound source By outputting a sound, the driver is surely
notified of an alarm sound of an emergency vehicle or the like outside the vehicle, and the driver
intuitively recognizes in which direction the sound source of the alarm sound is with respect to
the host vehicle. It can be done.
[0024]
Furthermore, when notifying the driver of an alarm sound such as an emergency vehicle or alarm
outside the vehicle, using the front, rear, left, and right speakers in the car, the direction in which
the sound source of the alarm sounds approaches or separates By outputting an alarm sound
notification sound from the direction in which the driver is driving, the driver is surely notified of
the alarm sound of an emergency vehicle or the like outside the vehicle, and the sound source of
the alarm sound approaches the vehicle from which direction, or The driver can intuitively
recognize in which direction the vehicle is to be separated from the vehicle side.
[0025]
In addition, speakers in directions other than the direction in which the sound source of the
alarm sound is present, that is, speakers in directions other than the direction in which the sound
source approaches the vehicle or directions away from the vehicle side By continuing to output
audio data from car audio sources such as music and radio that you have been listening to, it is
possible for the passenger to continue listening without interrupting the audio source that you
have been listening to. it can.
[0026]
FIG. 3 is a block diagram showing another example of the vehicle-mounted acoustic device in the
first embodiment of the present invention.
The on-vehicle acoustic device 20 further includes a volume control unit 14 as compared to the
on-vehicle acoustic device 10 shown in FIG. 1.
[0027]
The volume control unit 14 controls the speakers (2 to 5) of the direction by the output control
unit 13 based on the direction in which the sound source of the alarm sound calculated by the
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direction calculation unit 12 approaches or is separated. The driver is instructed to output an
alarm sound notification sound, which has been instructed to output to any one of them, to an
appropriate volume at which the alarm sound notification can be recognized.
Further, in order to make the warning sound notification sound easy to be heard and to be surely
recognized, control may be performed to lower the volume of the sound data from the sound
source outputted from the speaker in the other direction.
The function of the volume control unit 14 may be provided to the output control unit 13.
[0028]
As described above, when the alarm sound notification sound is output using the front, rear, left,
and right speakers in the car for the alarm sound of an emergency vehicle or alarm outside the
car, the speaker in the direction with the sound source of the alarm sound By outputting an
alarm sound notification sound at a volume that can be recognized by the driver, the driver can
be surely notified of an alarm sound of an emergency vehicle or the like outside the vehicle, and
at which direction the sound source of the alarm sound is directed to the own vehicle The driver
can intuitively recognize whether the
[0029]
Furthermore, using the front, rear, left, and right speakers inside the car, the sound source of the
alarm sound approaches or separates, using the front, rear, left, and right speakers in the car.
When the alarm sound notification sound is output from the direction, the driver is notified by
the driver of the alarm sound notification sound to the speaker in the direction in which the
sound source of the alarm sound approaches the vehicle or in the direction away from the
vehicle side. By outputting a sound volume that can be recognized by the driver, the driver is
surely notified of an alarm sound such as an emergency vehicle outside the vehicle, and from
which direction the vehicle approaches or is separated from the vehicle in any direction It can be
intuitively recognized by the driver as to what they are.
[0030]
Furthermore, when the sound source of the alarm sound approaches the vehicle, the sound
source of the alarm sound instructs to increase the volume of the alarm sound notification sound
output from the speaker in the direction approaching the vehicle, and the alarm sound If the
sound source of is separated from the vehicle side, an instruction may be issued to decrease the
volume of the alarm sound notification sound output from the speaker in the direction in which
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8
the sound source of the alarm sound is separated from the vehicle side. Good.
[0031]
In this case, in the volume control unit 14 (if the output control unit 13 has the function of the
volume control unit 14, the direction control unit 12 determines that the sound source of the
alarm sound is approaching the vehicle) In this case, the sound source of the alarm sound
instructs to increase the volume of the alarm sound notification sound output from the speaker
in the direction approaching the vehicle, and the direction calculation unit 12 separates the
sound source of the alarm sound from the vehicle side If it is determined that the warning sound
is to be reduced, an instruction is issued to decrease the volume of the warning sound
notification sound output from the speaker in the direction in which the sound source of the
warning sound is separated from the vehicle side.
[0032]
In this way, using the front, rear, left, and right speakers inside the car, the sound source of the
alarm sound approaches or separates, using the front, rear, left, and right speakers in the car.
When the alarm sound notification sound is output from the direction, the volume of the sound is
gradually increased as the sound source of the alarm sound approaches the vehicle or the
speaker moves away from the vehicle side. By raising the volume (increasing the volume) or
gradually decreasing the volume as you move away (reducing the volume), the driver is surely
notified of an alarm sound of an emergency vehicle or the like outside the vehicle, and from
which direction how much The driver can intuitively recognize whether it is approaching by
distance or in which direction and by what distance.
[0033]
Also, it does not indicate approaching or leaving by changing (increase or decrease) the volume,
for example, "slowly approaching", "further approaching", or "slowly away" It may be indicated by
a voice with an explanation such as “I am getting further away”.
[0034]
In this case, in the volume control unit 14 (if the output control unit 13 has the function of the
volume control unit 14, the direction control unit 12 determines that the sound source of the
alarm sound is approaching the vehicle) In this case, the speaker in the direction in which the
sound source of the alarm sound approaches the vehicle instructs to output by voice that the
sound source of the alarm sound approaches, and the direction calculation unit 12 generates the
sound source of the alarm sound as the vehicle When it is determined that the sound source of
the alarm sound is moving away from the vehicle side, it is instructed to output by voice that the
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sound source of the alarm sound is moving away from the speaker in the direction of moving
away from the vehicle side.
[0035]
In this way, using the front, rear, left, and right speakers in the car for approaching or separating
the alarm sound of an emergency vehicle or alarm outside the car, the direction in which the
sound source of the alarm sounds approaches the car, or When outputting an alarm sound
notification sound from the direction away from the vehicle side, the alarm sound is emitted to
the speaker in the direction in which the sound source of the alarm sound approaches the vehicle
or in the direction away from the vehicle side The driver is reliably notified of an alarm sound of
an emergency vehicle or the like outside the vehicle by outputting by voice an indication that the
sound source is approaching or being separated, and the user is approached at a distance from
which direction The driver can intuitively recognize whether the vehicle is moving or in which
direction the distance is away.
[0036]
FIG. 4 is a view showing a specific configuration example in the case where the on-vehicle
acoustic device 20 shown in FIG. 3 is applied to a car audio.
This car audio includes microphone 1, A / D converter 21, audio source 22, audio DSP 23, D / A
converter 24, volume controller 25, amplifier 26, CPU 27, left front speaker 2, right front
speaker 3, left rear A speaker 4 and a right rear speaker 5 are provided.
[0037]
In this car audio, the sound source of the alarm sound is detected by the audio DSP 23 after the
alarm sound from the external of the vehicle is collected by the microphone 1 such as siren
sound of an emergency vehicle or an alarm or the like of other vehicles around. The driver is
warned using the front, rear, left, and right speakers 2 to 5 in the direction in which the vehicle
approaches, in the direction away from the vehicle, or in the degree or distance of the approach.
Notify by.
[0038]
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10
Note that, in the configuration example in FIG. 4, the audio DSP 23 has the functions of the sound
acquisition unit 11, the direction calculation unit 12 and the output control unit 13 in FIG. 3, and
the CPU 27 has the function of the volume control unit 14 in FIG.
That is, the audio DSP 23 and the CPU 27 constitute the in-vehicle acoustic device 20 in FIG.
[0039]
As in the above-described specific example, for example, when the sound source of the alarm
sound approaches the vehicle from the rear right side of the vehicle, the alarm sound collected
by the microphone 1 is taken into the audio DSP 23 to calculate the direction. It is judged that it
is approach from the rear right side.
At this time, the analog signal collected by the microphone 1 is converted into a digital signal
through the A / D converter 21 and then taken into the audio DSP 23.
[0040]
Then, the audio DSP 23 transmits voice notification data to notify the approach of the alarm
sound to the speaker 5 of the right rear (rear R) channel to the D / A converter 24, and the other
left front (front L) channel speaker 2. For the speaker 3 on the right front (front R) channel and
the speaker 4 on the left rear (rear L) channel, the data of the audio source which has been heard
in the car until then is continuously transferred to the D / A converter 24.
[0041]
Thereafter, sound is output from each of the speakers 2 to 5 through the volume controller 25
and the amplifier 26.
As a result, alarm sound notification sound is output from the speaker 5 of the right rear (rear R)
channel, and audio sources such as audio and radio that were originally heard in the car are
output from the other speakers 2 to 4.
09-05-2019
11
[0042]
Further, in response to the alarm sound detection from the audio DSP 23, the CPU 27 controls
the volume controller 25 so as to obtain an appropriate sound volume at which the alarm sound
notification can be recognized for the driver.
The volume controller 25 is controlled for each channel.
[0043]
Since the distance between the driver and each speaker is different, the difference in the distance
is absorbed by changing the volume (volume value) for each speaker to which the alarm sound
notification is issued.
In addition, the notification of the alarm sound is made by lowering the volume (volume value) of
the sound source that has been heard in the car to a level at which the alarm sound can be
recognized for the other speakers than the speaker that issues the alarm sound. On the other
hand, the driver can easily recognize, and the passenger can continuously listen to the sound
source which has been heard so far without being interrupted.
[0044]
Furthermore, the volume of the alarm sound collected by the microphone 1 gradually increases
due to the approach of the sound source of the alarm sound to the vehicle, or the alarm sound
collected by the microphone 1 by the separation of the sound source of the alarm sound from the
vehicle side By detecting with the audio DSP 23 that the volume of the sound gradually
decreases, the CPU 27 increases the volume as the sound source of the alarm sound approaches
the vehicle only for the channel used in the alarm sound notification, or The volume controller
25 is controlled to decrease the volume as the sound source of the alarm sound moves away
from the vehicle side.
[0045]
If the alarm sound notification sound is an alarm sound such as an alarm or siren, control may be
made to change the volume according to the degree of proximity or separation of the sound
source of the alarm sound, but the alarm sound notification sound is For example, in the case of a
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voice with a description such as "Emergency vehicle is approaching" or "Emergency vehicle is
moving away", the audio DSP 23 may, for example, be "progressing gradually", "further
approaching" or " It is sufficient to indicate the degree of approach and the degree of separation
of the alarm sound by changing the voice content including the explanation such as "I am getting
further away" or "I am getting further away".
[0046]
As described above, by changing (increasing or decreasing) the volume of the alarm sound
notification sound according to the degree of approach and separation of the sound source of the
alarm sound, and changing and outputting the content of the alarm sound notification sound
including the explanation. The driver can also recognize the degree of approach and the degree
of separation in addition to the direction in which the sound source of the alarm sound
approaches the vehicle or the direction away from the vehicle side.
[0047]
In the first embodiment, it has been described that the speaker to which the warning sound
notification sound is output is one of the four speakers in the car, for example, the emergency
vehicle approaches from the rear of the own vehicle. When it comes, the alarm sound notification
sound may be output from the two speakers, such as outputting the alarm sound notification
sound from the two speakers of the left rear speaker 4 and the right rear speaker 5.
[0048]
Further, as the alarm sound notification sound, the alarm sound such as the alarm sound or the
siren sound is generated in the in-vehicle acoustic device 10 or 20, or the sound content
including the explanation is generated and output. However, it may be possible to amplify and
output an alarm sound such as a siren sound of an emergency vehicle or an alarm etc. collected
by the microphone 1 or a horn of another surrounding vehicle.
[0049]
In the on-vehicle acoustic devices 10 and 20 according to the first embodiment, the
microcomputer of the on-vehicle acoustic device such as a car audio to which the embodiment is
applied executes the program related to the processing specific to the present invention. And
software are realized as a concrete means of cooperation.
[0050]
As described above, according to the first embodiment, when the driver is notified of an alarm
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sound such as an emergency vehicle or alarm outside the vehicle, the sound source of the alarm
sound is used by using the front, rear, left, and right speakers in the car. By outputting an alarm
sound notification sound from a speaker in a certain direction, the driver is surely notified of an
alarm sound of an emergency vehicle or the like outside the vehicle, and at which direction the
sound source of the alarm sound is with respect to the host vehicle Can be intuitively recognized
by the driver.
[0051]
In addition, by continuing to output voice data from the audio source of car audio such as music
and radio originally heard in the car from speakers in directions other than the direction in which
the sound source of the alarm sound is present, it is possible for the passenger But you can
continue listening without interrupting the audio source you have been listening to.
[0052]
Furthermore, the alarm sound such as an emergency vehicle outside the vehicle can be surely
notified by the driver by outputting the alarm sound notification sound at a volume that can be
recognized by the driver to the speaker in the direction in which the sound source of the alarm
sound is present. The driver can intuitively recognize from which direction the user is
approaching or in which direction the user is approaching.
[0053]
In addition, the volume of the alarm sound notification sound may be changed (increased or
decreased) or the content of the alarm sound notification sound with an explanation according to
the proximity of the sound source of the alarm sound to the vehicle and the separation degree
from the vehicle side. By changing and outputting, in addition to the direction in which the sound
source of the alarm sound approaches the vehicle or the direction in which the driver separates
from the vehicle side, the driver also recognizes the degree of the approach and the degree of
separation. Can.
[0054]
As a result, even if the vehicle does not have a display function, the driver can not only recognize
the alarm sound of the emergency vehicle or the alarm by only using the sound, but also the
alarm sound that has conventionally been difficult to distinguish by sound Because the driver can
recognize the direction in which the sound sources are approaching, or the direction in which the
sound sources are separated, the degree of approach or the degree of separation, the avoidance
of an emergency vehicle while the vehicle is traveling or the prevention of an accident is further
enhanced. You can make money.
09-05-2019
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[0055]
In the present invention, within the scope of the invention, modifications of optional components
of the embodiment or omission of optional components of the embodiment is possible.
[0056]
1 microphone, 2 left front speaker of vehicle, 3 right front speaker of vehicle, 4 left rear speaker
of vehicle, 5 right rear speaker of vehicle, 10, 20 in-vehicle acoustic device, 11 voice acquisition
unit, 12 azimuth calculation unit, 13 Output control unit, 14 volume control unit, 21 A / D
converter, 22 audio source, 23 audio DSP, 24 D / A converter, 25 volume controller, 26
amplifier, 27 CPU.
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