Sound reproduction device

Details Sound reproduction device Sound reproduction device

1981-06-11

1983-07-19

Hickey, R. J.

179 1GP, H04H 500

Patent

active

043945376

ABSTRACT:
A sound reproducing device particularly adapted for use in the passenger compartment of an automobile and having improved stereo separation and symmetrical frequency characteristics. The device includes a high-pass filter circuit for passing, when a leakage signal occurs, a signal of equal frequency component to the leakage signal, an attenuation circuit for attenuating the level of the signal passed through the filter circuit to the level of the leakage signal, and a phase inverting circuit for inverting the phase of the signal thus attenuated so as to be opposite to that of the leakage signal, thereby to cancel out the leakage signal.

REFERENCES:
patent: 4149036 (1979-04-01), Okamoto et al.
patent: 4308423 (1981-12-01), Cohen
patent: 4329544 (1982-05-01), Yamada

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