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JPS53116701

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Notice
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
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DESCRIPTION JPS53116701
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view of a conventional on-vehicle
sound reproducing apparatus, FIG. 2 is a schematic view of a sound reproducing apparatus
according to an embodiment of the present invention, and FIG. 3 is a block diagram of the
present invention apparatus. FIG. 4 is a block diagram showing a row of reverberation equipment
used in the device of the present invention. 1
ииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии ? 6 6 Speaker 7
reproduction device 8, 8 'input terminal 9 adder 10 10 Amplifier, 11, 11 '..... Delay element,
12.12' ..... ... Reverberation apparatus, X13 13 13 '..... Attenuator, 14, 14' ..... и и и и и и и и и и и и и и и и и и и и
и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и Feedback circuit, 17 и и и и и.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sound
reproducing apparatus installed in a relatively narrow room such as a carp of a car, and provides
a sound reproducing apparatus that senses the spread of a sound field even when listening in a
small room. It is. One conventional car-mounted sound reproducing apparatus according to the
prior art is installed with FIG. In FIG. 1, reference numeral 1 denotes a car, and a front seat 2 and
a back strap 3 are provided in a single room of the car. The speakers 4 and 41 are disposed at
the rear of the rear seat 3 in the main room, and the two-channel stereo signal reproduced by the
reproduction electric power is applied to the respective speakers 4 and 4 ', respectively. , 4 'The
occupants of the passenger compartment of the vehicle interior hear and hear. ????????
???? However, as shown by the phantom line in FIG. ??????????? ? ????
?? There was a fault that makes 3 space feel. In the conventional example shown above,
when the front seat 20 occupant adjusts the volume suitable for him / her, the occupant of the
rear seat 3 has the speakers 4, 41 right behind his head, so the volume is more than necessary.
There was a drawback that I had to listen to Generally, when a human hears a sound from a
sound source, the sound energy density ratio between the direct sound reaching the ear directly
from the sound source and the acoustic energy density ratio of the indirect sound emitted from
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the sound source and reflected by the wall or floor is suitable for the ear The sense of distance is
judged, and when the indirect sound is small, the sound source is felt near when the indirect
sound increases and when the indirect sound increases. In the conventional automobile sound
reproduction and production vehicle shown in FIG. 1, it is a listening in a narrow car tail, the
distance between the speaker 4 ░ 41 and the passenger is relatively short, and the ceiling or
window of the cabin The delay time of the indirect sound that is reflected to reach the occupant's
ear is short, so the actual indirect sound is slightly <, the sense of distance at the sound source 1
becomes short, and the sound field is limited to the range shown in FIG. I did not feel The present
invention eliminates the above-mentioned disadvantages of the prior art, and an embodiment of
the present invention will be described in two sections below at 217 'along with 3 [% 4]. In FIG. 2
and FIG. 3, 1 is a car, 2 is a front seat, 3 is a rear seat, One thousand degrees is a speaker
disposed at the rear of the single room, 6 is a steering wheel, and 6 is a speaker disposed at the
front of the passenger compartment. In FIG. 3, 7 is a reproduction device, and the stereo signal of
2 channels ? v generated from the reproduction device 7 is i added to the input terminals 8 and
81, respectively. C9 is an adder, and a 2-channel stereo signal The signal is subjected to force
calculation by this adder 9, amplified by an amplifier 10, and then applied to a speaker 6
disposed at the front of the cabin.
In FIG. 3, 11 and 11 'are delay circuits, and BBD equal delay elements or the like are used. The
two delay circuits 11.11 'have different delay times, and each of the delay circuits 11.11' is
delayed in the range of 5 m5 ec to 20 msec by the delay circuits 11 and 111K. 12.12 'is a
remnant device which produces different reverberation characteristics respectively, and this' tii
station ia12, 12'o example i', an i-th 4r shown-ant-phase shift 'j,'; 1ts And the repatriation circuit
16. The system beats with the adder 1 end. The stereo signal delayed by the delay 11 string 11,
1i 'is reverberated by the reverberation device 12.12', and is transmitted to the rear of the
vehicle compartment through the attenuator 13.13 'and the amplifier 14.degree. Is applied to the
speakers 4 and 4 + disposed in the The force reducers 13, 13 'are interlocked. As described
above, according to the present invention, the direct sound is emitted from the front speaker 6,
the indirect sound is emitted from the rear speakers 4, 41, and the direct sound and the indirect
sound are heard by the player. The occupant feels the front speaker 6 at five points, feels the
rear speakers 4 and 4 'at points B and B', and feels the sound field in the range AI indicated by
the dotted line in FIG. The sound field expansion spectrum can be freely changed by adjusting the
attenuators 13 and 13 '. As described above, according to the present invention, the present
invention has the advantage of making the sound field wide and not feeling the relatively narrow
room. Also, according to the present invention, the rear Q, Suh-/ 4, 4 'Carelli rear VC feels that
there is a feeling' "и" y y), after, p4 (J suspension 3 crew members required sound-more than the
sound- The feeling of N1 is zero. 6 In the above embodiment, one speaker 6 is disposed in the
front, direct sound is emitted from the speaker 6, two speakers 4, 4 'are disposed in the rear, and
indirect sound is generated from the speakers 4, 41. In this example, the speakers 4 and 41 may
be disposed at the front and the speakers 6 may be disposed at the rear to emit indirect sound
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from the eyes 1 and direct sound from the rear. The number of speakers required is at least one
for direct sound and at least two for indirect sound. Although the example of the two-channel
stereo has been described in the above embodiment, even if a monaural signal is applied to the
input terminals 8 and 8 'in FIG. Although the delay circuit 11.11 'having different delay times is
used as the delay circuit' 1.11 'in the upper L "+ embodiment, the sound field is expanded even if
the delay time of the delay circuit 11.11' is the same. The effect is obtained, but the effect is
small.
The remaining IIII of both reverberators 12.12 '! ! Even with the same f characteristics, the effect
of sound field expansion can be obtained. End
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