Sound reproduction device

Patent

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179 1GP, H04R 500

Patent

active

043945368

ABSTRACT:
A sound reproducing device adapted to be operated in a narrow space such as the passenger compartment of an automobile including a voltage amplifying or attenuating circuit for varying a difference signal between stereophonic right and left signals and a filter circuit. The voltage amplifying or attenuating circuit and filter circuit are provided in a circuit which produces a reverberation effect and an acoustic spreading effect for reproduced sound to decrease the closed-room effect. Each of these circuits is provided with a varible resistor, wherein the listener can vary the reverberation and acoustic spreading effects as desired.

REFERENCES:
patent: 4219696 (1980-08-01), Kogure et al.
patent: 4308423 (1981-12-01), Cohen
patent: 4329544 (1982-05-01), Yamada

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