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JP2009255797

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DESCRIPTION JP2009255797
The present invention provides an on-vehicle front speaker in which a sound image is stably
localized in front of a front seat. A front of a front seat 6 of a car is stored in a speaker cabinet 3
at a position hidden behind a seat front edge from a position of a person sitting on the front seat
6, and a belt, The straps or belts are arranged for locking, and the central axis of the front
speaker 1 is directed to the dashboard 5. [Selected figure] Figure 1
Automotive front speakers
[0001]
The present invention relates to an on-vehicle front speaker.
[0002]
In the past, the speakers were arranged so that the sound image of the main speakers of the invehicle acoustic device was positioned behind the front seat.
However, since a person can hear the sound from the front without a sense of incompatibility,
the sound image of the front speaker is mainly used now so that the sound image is in front.
[0003]
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However, since it is difficult to arrange a large speaker in front of the front seat due to the
structure of a car, the front speaker is actually mounted on the door. And since a speaker is
attached to the surface of a door, a speaker turns to a completely different direction from the
person who sat on the seat. Moreover, the deviation in this direction is largely different between
the left and right speakers.
[0004]
In general, the high range of the full range speaker drops in level sharply as the angular
deviation from the frontal direction increases. For this reason, according to the door mount
speaker described above, the frequency and strength characteristics of the front seat are
significantly different on the left and right. Then, tweeters are attached to the dashboard because
the left and right speakers lack the sound intensity in the high range, but the imbalance between
the left and right remains.
[0005]
In addition, in the door mount, since the cavity (space behind the speaker) is insufficient, the low
frequency band can not be output. For this reason, although a subwoofer is required, when the
subwoofer is disposed rearward, there is a problem that forward localization is disturbed and, for
example, only a bass drum or a base can be heard from the rear.
[0006]
In the on-vehicle speaker disclosed in Japanese Patent Application Laid-Open No. 5-328483,
medium-to-high-tone speakers 6a and 6b attached to the left and right of the instrument panel 5
are mounted with their sound emitting surface facing the windshield 7. Then, the sound in the
range of 0 ° to 30 ° of the speaker is reflected by the windshield 7 and reaches the listener's
ear.
[0007]
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In the on-vehicle speaker disclosed in the above-mentioned Japanese Patent Application LaidOpen No. 5-328483, the middle to high-pitched speakers 6a and 6b are disposed at positions
where they are connected by a straight path from the listener's ear. Therefore, the sound radiated
in the peripheral direction from the speakers 6a and 6b directly reaches the listener's ear, that is,
the direct sound and the reflected sound from the mid-high range speaker 6a and 6b
simultaneously reach the listener's ear .
[0008]
Therefore, there is a problem that the sound image is difficult to localize. Also, since the surface
of the windshield is directed downward, the sound reflected by the windshield is reflected
downward. That is, a sound deviated from the central axis of radiation reaches the listener's ear,
which also causes a problem that the sound image is difficult to localize. Unexamined-JapanesePatent No. 5-328483
[0009]
The present invention has been made in view of the above-described point, and an object thereof
is to provide an on-vehicle front speaker in which a sound image is stably localized in front of a
front seat.
[0010]
The on-vehicle front speaker according to the present invention is disposed in front of the front
seat of the car and in a position invisible behind the front edge of the seat from the position of
the ears of the person sitting on the front seat The axis is in the direction of the dashboard.
[0011]
Further, in the on-vehicle front speaker, the speaker cabinet is accommodated in a speaker
cabinet having an inclined surface formed on the rear surface, and the inclined surface is fixed so
as to abut on a seat front edge.
[0012]
In each of the vehicle-mounted front speakers, one of two L channel speakers and one of R
channel speakers can be switched for use. If two L channel speakers are provided, these two are
available. Speakers are arranged on the left side of the left and right front seats, and one
remaining R channel speaker is arranged on the right side of the right front seat, and when two R
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channel speakers are provided, these two The speakers are disposed on the right side of the left
and right front seats, and the remaining one L channel speaker is disposed on the left side of the
left front seat.
[0013]
In each of the vehicle-mounted front speakers, the front seat is locked by a belt, a cord or a hook.
[0014]
According to the in-vehicle front speaker of the present invention, the sound image is stably
localized in front of the front seat.
[0015]
Hereinafter, the best mode for carrying out the present invention will be described according to
an embodiment.
[0016]
1 is a side view showing an on-vehicle front speaker according to a first embodiment of the
present invention, and FIG. 2 is a plan view showing the arrangement of the on-vehicle front
speaker.
As shown in FIG. 2, the L channel speaker 1 and the R channel speaker 2 are respectively
disposed to the left and right of the driver's seat 6.
[0017]
The positions in the height direction of the L channel speaker 1 and the R channel speaker 2 are
shown in FIG.
Although FIG. 1 shows a state in which the L channel speaker 1 is housed in the speaker cabinet
3, the same applies to the R channel speaker 2.
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[0018]
The speaker cabinet 3 shown in FIG. 1 is formed in a box shape having a pentagonal cross
section, an inclined surface 3b is formed on the upper rear surface, and a baffle 3a is formed on
the upper front surface.
The L channel speaker 1 is fixed to the inner surface of the baffle 3a.
Align the position of the driver's seat 6 in the front-rear direction and the height with the
position where the driver can drive easily, and place the bottom of the speaker cabinet 3 with
double-sided tape so that the inclined surface 3b of the speaker cabinet 3 contacts the front edge
of the driver's seat 6. It is fixed to the floor of the vehicle.
[0019]
Thus, when the speaker cabinet 3 is fixed, the line extending perpendicularly from the center of
the baffle 3 a is directed to the dashboard 5.
Therefore, the sound radiated from the L channel speaker 1 proceeds in the direction of arrow a
shown in FIG. 1, is reflected by the dashboard 5 and proceeds in the direction of arrow b and
reaches the driver's ear.
[0020]
Further, since the L channel speaker 1 is out of the straight line indicated by the broken line c
extending from the driver's ear, the direct sound from the L channel speaker 1 does not reach the
driver's ear.
Similarly, the direct sound does not reach the driver's ear for the R channel speaker 2 as well.
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[0021]
Note that it is preferable for sound image localization that the baffle 3a of the speaker cabinet 3
for the L channel speaker 1 is directed slightly to the right, and the baffle 3a of the speaker
cabinet 3 for the R channel speaker 2 is slightly directed to the left.
In addition, although the cavity of the speaker cabinet 3 depends on the shape of the vehicle, it
can be generally larger than the cavity obtained by the door mount, and it is easy to emit bass.
[0022]
With such a speaker arrangement, it is possible to obtain a sound image stably localized in the
front of the front for a person sitting on the driver's seat 6. It is also possible for a person sitting
on the front passenger seat 7 or the rear seat 8 to obtain a sound image that is not front but
localized forward.
[0023]
In addition, although the said Example 1 targets the thing which can raise a sound volume and
can pursue high-quality sound in a bad environment regarding noise when only one driver is
boarding, when there is the same board, Since the volume is usually lowered, the meaning of
improving the sound quality and the sound image localization is diminished when the extraneous
noise is taken into consideration. In the case of playing audio as BGM, there is no big problem in
the first embodiment.
[0024]
The interior of the car is an acoustically poor environment (regard to echo). If the paths of the
left and right sounds differ greatly, the situation of the reflected sound also differs greatly
between the left and right, and correct sound image localization can not be obtained. By making
the left and right sound paths completely symmetrical, sound image localization with less
disturbance can be obtained.
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[0025]
FIG. 3 is a plan view showing the arrangement of an on-vehicle front speaker according to a
second embodiment of the present invention.
In this example, the L channel speaker 1 in the first embodiment is additionally used on the front
left side of the passenger seat 7, and one of the two L channel speakers 1 is selected by the
changeover switch 4 and used. Then, when one driver is on board, the L channel speaker 1 of the
driver's seat 6 is used. At this time, the configuration is the same as that of the first embodiment,
and the effect of the first embodiment can be obtained.
[0026]
When the passenger seat is also taken, the L channel speaker 1 of the passenger seat 7 is used.
At this time, the sound image is localized in front of the center of the vehicle. At this time, the
position of the sound image from the driver's seat is slightly worse than in the first embodiment,
but the effect of improving the position of the sound image at the passenger seat 7 is large.
[0027]
FIG. 4 (a) is a side view showing the arrangement of an on-vehicle front speaker according to a
third embodiment of the present invention. In this example, the bottom of the speaker cabinet 3
of the L channel speaker 1 (the same is true for the R channel speaker 2) in the first embodiment
is not fixed to the floor of the vehicle by double-sided tape but It is locked. According to this
example, even after the speaker cabinet 3 is locked to the driver's seat 6, the position of the
driver's seat 6 in the front-rear direction can be adjusted. And the effect of Example 1 is also
show ¦ played.
[0028]
FIG. 4B is a side view showing the arrangement of an on-vehicle front speaker which is a
modification of the third embodiment of the present invention. In this example, the speaker
cabinet 3 of the L channel speaker 1 (the same applies to the R channel speaker 2) in the first
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embodiment is locked to the driver's seat 6 by the belt 10 having one stretchability. According to
this example, even after the speaker cabinet 3 is locked to the driver's seat 6, it is possible to
adjust the position and height of the driver's seat 6 in the front-rear direction. And the effect of
Example 1 is also show ¦ played.
[0029]
Although the embodiment is configured as described above, the invention is not limited thereto.
For example, in the case of applying the invention to a vehicle with a left steering wheel having a
driver's seat on the left side in Embodiment 2, two R channel speakers Can be arranged on the
right side of the driver's seat and the passenger's seat, respectively, and one of them can be
switched and used.
[0030]
It is a side view which shows the vehicle-mounted front speaker which is Example 1 of this
invention.
It is a top view which shows arrangement ¦ positioning of the front speaker for vehicles. It is a
top view which shows arrangement ¦ positioning of the vehicle-mounted front speaker which is
Example 2 of this invention. It is a side view which shows arrangement ¦ positioning of the
vehicle-mounted front speaker which is Example 3 of this invention.
Explanation of sign
[0031]
1 L channel speaker 2 R channel speaker 3 speaker cabinet, 3a baffle, 3b inclined surface 4
changeover switch 5 dashboard 6 driver's seat 7 passenger's seat 8 rear seat 9 wire, 9a hook 10
belt
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