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JPH03192899

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DESCRIPTION JPH03192899
[0001]
FIELD OF THE INVENTION The present invention relates to an on-vehicle speaker device.
Generally, the positional relationship between the listening position and the left and right
speaker devices is asymmetrical in the interior of the vehicle. FIG. 3B is a partially cutaway
schematic plan view of a vehicle compartment provided with the speaker device of FIG. 3A, and a
partially cutaway schematic side view of FIG. 3B. Show. In FIG. 3, 3 is a dash board, 4 is a driver's
seat, 5 is a passenger seat, 7 is a speaker, and is a speaker device installed at both left and right
ends of the dash board 3. The invention is going to be solved a! Problem However, in the
conventional speaker apparatus shown in FIG. 3, the sound pressure level is higher and the
arrival time is earlier for the sound from the speaker closer to the listening position at the
listening position of the driver's seat and the passenger seat. , Localization of the sound image is
thick (biased to close speakers, and natural stereo confusion can not be obtained. The present
invention solves the above-mentioned problems, and in both the driver's seat and the passenger's
seat in the vehicle room, the localization of the sound image is large, without being biased to a
part close to each listening position, and an angry noise The purpose is to realize the place in the
passenger compartment. Means for Solving the Problems In order to achieve the object, an onvehicle speaker device of the present invention is provided with a diaphragm elongated in the up
and down direction of the vehicle compartment, and sounds from the left and right ends of the
vehicle compartment to the lower part of the vehicle interior. Emit In the vehicle cabin according
to the present invention, the localization of the sound image is large in both the driver's seat and
the passenger seat in the vehicle cabin, and is not biased to the speakers near the respective
listening positions (a sound field with a sense of expansion is realizable. Embodiments
Hereinafter, one embodiment of the present invention will be described with reference to the
drawings. The attachment of the in-vehicle speaker device in the example indicates the position.
In FIG. 1 and FIG. 2, 1 is an acoustic tube, 2 is a horn driver, 3 is an opening of the acoustic tube
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1, 4 is a dash board, 5 is a driver's seat, 6 is a passenger seat, 21 is a sound source, 22 and 23
are It is an amplifier. The operation of the loudspeaker apparatus configured as described above
will be described below. As shown in FIG. 1, the speaker device in the present embodiment is a
horn speaker device provided with an acoustic tube whose cross-sectional area changes
continuously from the throat portion of the horn to the opening portion, and the aperture of the
acoustic tube The shape of the portion 3 is an elongated slit shape. FIG. 2 is a partially cutaway
schematic plan view and a partially cutaway schematic side view of the vehicle compartment
showing the mounting of the speaker device in the present embodiment.
In the present embodiment, the speaker device is installed with the vertical direction in the
vehicle compartment aligned with the longitudinal direction of the opening 3 of the acoustic tube
1 and at the left and right ends of the dash board 4 directed downward in the vehicle
compartment. The directivity of the sound emitted from the rectangular rectangular sound
source at -C becomes sharper in the longitudinal direction of the sound source. Accordingly, the
directional characteristics of the force direction AA 'in the longitudinal direction of the opening 3
of the acoustic tube 1 become sharp in FIG. 2, so that the driver's seat can emit sound from the
speaker device downward in the vehicle compartment. The influence of the direct sound from the
speaker device close to the listening position can be reduced in both of 5 and the front passenger
seat 6. Conversely, the directivity characteristic in the direction B-B, which is the normal
direction, is broad, so that the frequency characteristic of the sound from the distant speaker
device is also improved simultaneously. Further, a reflected wave from the floor, wall or the like
of the conductor forms a sound field of indirect sound control in the vehicle compartment, which
becomes a sound field having a sense of expansion. Effects of the Invention As described above,
according to the present invention, since the diaphragms elongated in the vertical direction of the
vehicle compartment are provided and installed at the left and right ends of the vehicle
compartment toward the lower side of the vehicle compartment, driving in the vehicle
compartment In both the seat and the front passenger seat, a sound field having a wide spread
can be realized in the vehicle cabin without the localization of the sound image being large and
biased to the speakers near the respective listening positions.
[0002]
Brief description of the drawings
[0003]
FIG. 1 is a perspective view of an on-vehicle speaker device according to an embodiment of the
present invention, and FIGS. 2 (a) and 2 (b) are mountings of the on-vehicle speaker device
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according to an embodiment of the present invention It is a partial notch schematic plan view
and a partial notch schematic side view of a chamber.
1·················································································
opening of the acoustic tube, 4 · · · · · Dansch board, 5 · · · Driver's seat, 6 ... ... passenger's seat.
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