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JPS5989246

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DESCRIPTION JPS5989246
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an
on-vehicle sound reproducing apparatus capable of localizing a sound image in the front. In
general, as shown in FIG. 1, the structure of the conventional example and its problems are
provided with holes at the left and right positions of the rear panel 1 at the rear of the vehicle
interior as shown in FIG. As shown in FIG. 2, a method is adopted in which speaker boxes 3 are
installed at the left and right positions of the rear panel 1 and the audio signal is reproduced by
the above right speaker. In this sound reproduction method, it is difficult to move the sound
image to the front of the driver's seat and perform powerful car interior reproduction, since the
sound field is behind the scenes. Therefore, as a measure against these problems, as shown in
FIG. 3, the sound field is localized forward of the driver's seat by attaching the speaker 2 to the
driver's seat and the door 4 on the side of the passenger seat or the body side 5 on the front of
the door. The method is adopted. However, when the speaker unit 2 and the speaker box 3 are
disposed on the rear panel 1 as shown in FIG. 1 and FIG. As shown by ?, the sound image is
always reflected behind the listener because it is reflected only by the rear glass of the seat and
the top plate. On the other hand, as shown in FIG. 3, in the case of the reproduction method in
which the speaker 2 is attached to the driver seat and the door part on the side of the passenger
seat and the body side part on the front of the door, the sound transmission state is apparent
from the broken line 8 Always comes from the front of the listener's position (seat position),
which allows the sound image to be localized forward, but with the above playback method, the
speaker 2 is attached to both sides of the vehicle interior Because it is easy to cause unbalance in
the left and right reproduced sound that only the reproduced sound from one side speaker can
be heard thickly, it is difficult to realize powerful in-vehicle acoustic reproduction without losing
the sense of stereo . SUMMARY OF THE INVENTION It is an object of the present invention to
provide an on-vehicle acoustic reproduction device that allows a sound image to be localized
10-05-2019
1
forward and enables powerful in-vehicle acoustic reproduction without losing the sense of stereo.
Configuration of the Invention In a vehicle-mounted acoustic reproduction device according to
the present invention, a thin speaker for acoustic reproduction is attached to a top plate above a
seat in a vehicle compartment so that the speaker diaphragm surface faces the windshield.
According to such a configuration, it is possible to move the virtual sound source forward of the
windshield, thereby achieving a powerful in-vehicle acoustic reproduction that allows the sound
image to be localized forward and does not disturb the stereo feeling. it can.
DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 4 and 5 show an embodiment of the
present invention, in which 9 are thin left and right speakers, which are for the driver and
assistant in the front of the vehicle interior. The speaker diaphragm is attached to the top plate
11 above the seat 10 so as to face the windshield 12. Here, as shown in FIGS. 6 and 7, the thin
speaker 9 for attachment to the interior top plate 11 is a rectangular diaphragm for the purpose
of improving the space factor of the loudspeaker diaphragm 20 as shown in FIGS. 6 and 7. The
speaker box 22 is similarly formed in a box shape with a reduced thickness, and a slope 23 is
provided on the upper surface of the rear portion. Then, the speaker box 22 with the rectangular
speaker unit 21 attached is mounted on the top plate 11 above the seat 1 o as shown in FIGS. 3
and 4 so that the speaker diaphragm 2 o faces the front glass 12. It is By performing
reproduction in the passenger compartment in this state, the transmission state of the sound
reproduced from the thin rectangular speaker 9 is as shown by a broken line 13. As apparent
from this, since the speaker reproduction sound is reflected by the interior surface of the
windshield 12, it is possible to move the virtual sound source 14 to the front of the windshield
12, whereby the sound image is forwardly transmitted. It is possible to localize the In addition,
the reproduction sound from the left and right of the speaker is transmitted from the front of the
listener, and the distance between the listener and the virtual sound source 14 can be increased.
Compared to the method, there is an advantage that the balance adjustment of the left and right
reproduction sound can be easily performed, and this enables powerful car interior sound
reproduction without losing the sense of stereo. As described in detail in the invention, by using
the vehicle interior reproduction method of the present invention, it is possible to localize the
sound image forward and perform powerful vehicle interior sound reproduction without losing
the sense of stereo, which is simultaneously simultaneous. It is possible to realize a pleasant invehicle acoustic reproduction, such as little variation in sound pressure at each seat position
(driver's seat, passenger seat, rear seat) 0
[0002]
Brief description of the drawings
[0003]
10-05-2019
2
1, 2 and 3 are block diagrams of the conventional on-vehicle acoustic reproducing apparatus,
FIG. 4 is a plan view showing one embodiment of the on-vehicle acoustic reproducing apparatus
of the present invention, and FIG. 5 is the same apparatus FIG. 6 is a perspective view of the
configuration of a speaker used in the apparatus, and FIG. 7 is a cross-sectional view of the
speaker.
9 ...... thin form speaker, 10 ...... front seat, 11 ... ... top plate, 12 ...... windshield, 20 ...... speaker
Diaphragm, 21 иииииии Rectangular speaker unit, 22 иииииииииииииии Speaker box. Name of agent Attorney
Nakao Toshio and 1 other person Fig. 12/3 Ta / / Fig. 5 277-Fig. 6 Fig. 7? ?
10-05-2019
3
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