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JP2005145427

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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 JP2005145427
An object of the present invention is to detect the movement of a passenger's seat position and
seat position, the height of a passenger's ear, etc. and adjust the vehicle mounting angle and
position of a suitable speaker to provide optimum sound quality. Provide a way to improve sound
quality through adjusting the speaker angle. According to the present invention for achieving the
above objects, there is a step of setting a reference sound field corresponding to each case that
may occur depending on the number and position of passengers on board a vehicle. Creating a
memory table for determining the speaker angle for each sound field; detecting the position and
number of passengers and the position of the passenger's ears; and a speaker corresponding to
the result detected as described above. The method is characterized by including the steps of:
reading the angle of か ら from the memory table to determine the movement angle of the
speaker; and moving each speaker according to the movement angle of the speaker. [Selected
figure] Figure 1
How to improve sound quality through adjusting the speaker angle
[0001]
The present invention relates to a method of improving sound quality through angle adjustment
of a speaker, and in particular, detects a position and number of passengers and height of a
passenger's ears, and adjusts a vehicle mounting angle and position of the speaker to match. The
present invention relates to a method of improving sound quality through adjusting the angle of
a speaker, which can provide optimum sound quality in a vehicle.
[0002]
10-05-2019
1
In a general vehicle, at the time of sound tuning, a sound field is formed mainly on the driver's
seat or around the VIP seat to tune the sound quality (see, for example, Patent Document 1).
That is, in the conventional vehicle, since the sound quality tuning is performed in consideration
of the passenger at the specific position, the sound quality tuning in consideration of the seat
position of the entire vehicle practically has a limit point.
[0003]
Furthermore, since the conventional vehicle speaker is a fixed type and the position and
mounting angle of the speaker are fixed, it is impossible to form an appropriate sound field
according to the passenger's riding position, and a tweeter that reproduces high-pitched sound In
the case of (tweeter), since the sound straightness is strong, it is important to set the angle to the
direction of the listener's ear, but this adjustment was impossible with existing vehicles.
Furthermore, in most vehicles, the position of the speaker is located at the lower part of the door,
and a sense of sound is formed at the portion of the passenger's leg, which makes it impossible to
provide good sound quality. Unexamined-Japanese-Patent No. 5-244684
[0004]
The object of the present invention is to detect the movement of the passenger's boarding seat
position and seat position, the height of the passenger's ear, etc., and adjust the vehicle mounting
angle and position of the speaker to fit this to provide the optimum sound quality It is an object
of the present invention to provide a method of improving the sound quality through the
adjustment of the angle of the speaker, which enables to
[0005]
In order to achieve the above objects, the method for improving sound quality through adjusting
the speaker angle according to the present invention respectively corresponds to various layouts
of passengers that may occur depending on the number and positions of passengers on board a
vehicle. Setting a reference sound field; creating a memory table for determining the speaker
angle for each of the reference sound fields; detecting the position and number of passengers
and the position of the passengers' ears Reading the angle of the speaker corresponding to the
result detected as described above from the memory table to determine the movement angle of
the speaker; and moving each speaker according to the movement angle of the speaker It is
characterized by
10-05-2019
2
[0006]
As described above, according to the present invention, the position and number of passengers
are detected by the piezoelectric element provided in the seat of the vehicle, and the positions of
the passengers' ears are detected by the ultrasonic sensors provided at the left and right lower
ends of the vehicle roof. We will create a reference sound field memory table that matches the
position and number of passengers determined based on this information, and apply it to each
speaker according to the sound pressure output level ratio determined for each speaker By
adjusting the angle of the speakers through the angle adjuster mounted on each speaker so that
sound pressure output is generated from the speakers, for any passenger's boarding environment
considering the number of passengers and the sitting position The sound quality of the speakers
can be improved by making the most suitable sound pressure output for each speaker.
[0007]
Hereinafter, an embodiment of the present invention will be described in detail by the attached
drawings.
1 and 2 show the case of one passenger, FIG. 1 shows the adjustment of the speaker position in
the case of one driver, and FIG. 2 the case of one VIP seat.
[0008]
For reference, the speakers 11 to 15 of the present invention are speakers provided with an
angle adjuster (not shown) capable of adjusting the direction of the speaker, and the mounting of
the angle adjuster can be realized by a known technique Therefore, the explanation for this is
omitted.
[0009]
As shown in the figure, in the case of one passenger located in one of the driver's seat and the
VIP seat, the left and right angles of the speakers 11 to 15 may be adjusted to the position of one
passenger.
10-05-2019
3
In particular, after an ultrasonic detection sensor (not shown) is attached to the roof portion of
the vehicle to detect the highest height of the head of the occupant, the angle is adjusted so that
the speaker is directed about 15 cm below that position.
This is because the position of the human ear is usually about 15 cm below the top of the head.
[0010]
In particular, unlike the driver's seat, it is possible for the passenger in the rear seat to move to
the left and right, so after a certain time t has elapsed, the passenger's position is re-searched to
match the searched position. Adjust the speaker angle to.
[0011]
FIGS. 4 to 6 show a case where a plurality of passengers get on the vehicle, FIG. 4 shows the case
of 2 passengers, FIG. 5 shows the case of 3 passengers and FIG. 6 shows 4 passengers. In the
case of, it is a drawing showing the formation position of the reference sound field.
[0012]
In the case of FIG. 3 where there is one passenger, the reference sound field takes the place
where each one passenger (a or d) is located as the position of the reference sound field (S1, S2),
but from the sitting position Position slightly forward.
[0013]
When two passengers shown in FIG. 4 are considered, the formation position of the reference
sound field is determined as follows.
First, when the driver's seat (a) and the passenger's seat (b) are in front, the formation position of
the reference sound field (S3) is a position slightly forward from the middle point of the two
seats (see FIG. A) .
When two passengers get on the rear seats (c, d) of the vehicle, the formation position of the
reference sound field (S4) is a position located slightly ahead of the middle point of the rear seats
(c, d) See figure b).
10-05-2019
4
When two passengers get on the left seat (a, c) of the vehicle, the formation position of the
reference sound field (S5) is a location located slightly behind the front seat (a) (see FIG. C). ).
When two passengers get on the right seat (b, d) of the vehicle, the formation position of the
reference sound field (S6) is a place located slightly behind the front seat (b) (see FIG. D) ).
[0014]
In the case of FIG. 5 where three passengers got on, the formation position of the reference
sound field is determined as follows. First, when the driver's seat (a) and the passenger's seat (b)
and the rear seat (c) of the driver's seat were on, the formation position of the reference sound
field (S7) was slightly to the right from the back of the driver's seat (a) It is a place (see Figure a).
When three passengers get on the driver's seat (a) and the right-hand seat (b, d) of the vehicle,
the position where the reference sound field (S8) is formed has moved slightly to the left from
behind the passenger seat (b) (See Figure b). When three passengers get on the driver's seat (a)
and the rear seat (b, d) of the vehicle, the formation position of the reference sound field (S9) is
slightly to the right from the front of the seat (c) behind the driver's seat Let it be the moved
position (see figure c). When three passengers get on the passenger seat (b) and the rear seat (c,
d) of the vehicle, the formation position of the reference sound field (S10) moves slightly to the
left from the front of the rear VIP seat (d) Position. (See Figure d).
[0015]
Next, when four passengers in FIG. 6 get on the vehicle, the formation position of the reference
sound field (S11) is a position moved slightly backward from the middle between the driver's seat
(a) and the assistant's seat (b).
[0016]
As described above, when a plurality of passengers get on, the left and right angles of the
speakers are adjusted in accordance with the set position of the set reference sound field (S3 to
S11) to provide the optimum sound quality to suit the passenger boarding situation be able to.
10-05-2019
5
At this time, when adjusting the angle of the speaker, the heights of the ears at each position of
the passenger are detected and an average value is taken out so that the vertical angle
adjustment of the speaker can be made together.
[0017]
In the above example, especially when one passenger gets on the rear seat (c, d) of the vehicle,
after a certain time has passed since there is a high probability that the getting-in position will be
changed at an early stage, The position of the speaker is re-searched so that the angle of the
speaker is readjusted according to the position.
[0018]
As described above, the number of reference sound fields (S1 to S11) that can be formed
according to the number of passengers getting on the vehicle and the position of the seat is set to
11, and such 11 reference sound fields (S1 to S11) are set. A memory table in which the sound
pressure output level ratio for each speaker in the vehicle is calculated for S11) is created, and an
example thereof is shown in <Table 1> below.
[0019]
In Table 1, the number representing the output level ratio of each speaker's sound pressure is the
sound pressure output level ratio between the speakers, and represents the relative magnitude of
the sound pressure output level, so the reference The magnitude can be adjusted while
maintaining the basic sound pressure output ratio set for each sound field.
That is, it is possible to create a memory table of a form other than the same memory table as
that of <Table 1>.
[0020]
For example, in the case where one passenger board the VIP seat (d), the set reference sound
field (S2) corresponds to each speaker (11, 12, 13, 14, 15) according to the memory table. The
sound pressure output level ratio during the period is (0.3, 0.8, 0.5, 1, 1).
10-05-2019
6
Therefore, the size of the speaker 14 and the PT speaker 15 of the VIP seat (d) is set to “1”,
and the speakers 11 to 13 at the remaining positions have larger sound pressure output levels
than the speakers located closer to the adjacent distance. Make it set. Therefore, the sound
pressure output level ratio of the speakers 11 to 13 is set to (0.3, 0.9, 0.7) instead of (0.3, 0.8,
0.5) in the illustrated memory table It is also possible.
[0021]
In particular, the speaker 15 (Package Tray) located at the rear of the vehicle plays a role of
reproducing the bass in the sound and does not have a large influence by the seat position of the
passenger, and the same sound is produced regardless of the passenger's position. The pressure
output ratio "1" was applied.
[0022]
Furthermore, the position of the passenger can be determined by attaching a piezoelectric
element (not shown) to the seat of the seat, and the left and right angles of the speaker are set at
the time of vehicle sound quality tuning depending on the number and position of each
passenger. And store it in a separate memory.
[0023]
In particular, ultrasonic sensors are attached to the left and right lower ends of the door roofs of
each seat to grasp the top position of the passenger's head so that the position of the passenger's
ears is set about 15 cm below that position.
And the angle adjustment of the speaker is realized by using the motor drive of the angle
adjuster provided in the speaker.
[0024]
Next, the process of adjusting the angle of the speaker will be described with reference to FIG. 7
using the memory table in which the sound pressure output level ratio by reference sound field
obtained above is set.
10-05-2019
7
FIG. 7 is a flow chart showing the process of adjusting the angle of the speaker for sound quality
improvement according to the present invention. As shown in FIG. 7, first, the position and the
number of passengers are detected using piezoelectric elements provided on the seat of the
vehicle (S10), together with the positions of the passengers' ears using an ultrasonic sensor and
Detect the number of people. (S11)
[0025]
Next, the left and right angles of each speaker that must be moved with reference to the current
speaker position so as to match the output level ratio of the speaker sound pressure that matches
the memory table preset based on the measured information Determine the value and the upper
and lower angle values. (S12)
[0026]
Next, the angle value of each speaker set on the side of the angle adjuster of the speaker attached
to each speaker is transmitted (S13), and the angle of the speaker is adjusted. (S14)
[0027]
On the other hand, when the passenger gets on the rear seat, the position of the passenger is
likely to move in the initial stage of the ride, so the position and number of the passenger are researched after a predetermined time (t) has passed. (S15) If the re-searched information is
identical to the already measured information, the current speaker position is maintained as it is
(S17), and if it is different from the already measured data, left and right from the currently
provided speaker position And move up and down. (S18)
[0028]
It is the drawing which showed the condition which adjusts the position of a speaker, when a
passenger is one person. It is the drawing which showed the condition which adjusts the position
of a speaker, when a passenger is one person. (A) It is the drawing which showed the state which
set the position of the reference sound field in a vehicle, when a passenger | crew is one person.
10-05-2019
8
(B) It is the drawing which showed the state which set the position of the reference sound field in
a vehicle, when a passenger | crew is one person. (A) It is the drawing which showed the state
which set the position of the reference sound field in a vehicle, when a passenger | crew is two
persons. (B) It is the drawing which showed the state which set the position of the reference
sound field in a vehicle, when a passenger | crew is two persons. (C) It is the drawing which
showed the state which set the position of the reference sound field in a vehicle, when a
passenger | crew is two persons. (D) It is the drawing which showed the state which set the
position of the reference sound field in a vehicle, when there are two passengers. (A) It is the
drawing which showed the state which set the position of the reference sound field in a vehicle,
when a passenger | crew is three persons. (B) It is the drawing which showed the state which set
the position of the reference sound field in a vehicle, when a passenger | crew is three persons.
(C) It is the drawing which showed the state which set the position of the reference sound field in
a vehicle, when a passenger | crew is three persons. (D) It is the drawing which showed the state
which set the position of the reference sound field in a vehicle, when a passenger | crew is three
persons. When there are four passengers, it is the figure which showed the state which set the
position of the reference sound field in a vehicle. FIG. 5 is a flowchart of speaker angle
adjustment execution according to the method of the present invention.
Explanation of sign
[0029]
11 to 15 Speakers S1 to S11 Reference sound field a to d Passengers
10-05-2019
9
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