Electrical audio signal processing systems and devices – Vehicle
Patent
1992-05-12
1993-06-08
Isen, Forester W.
Electrical audio signal processing systems and devices
Vehicle
381 28, 381102, H03G 900
Patent
active
052186431
ABSTRACT:
An audio system for a vehicle wherein the feeling of a passenger on the rear seat of the vehicle in listening to sound can be improved only by operation of a sound volume switch of a manually operating section without the necessity of operation of any other switch. A microcomputer detects an attenuation amount from an operating section and outputs to an equalizer, when the attenuation amount is lower than a predetermined value, a medium and high frequency sound region controlling signal for attenuating sound in the medium and high frequency sound regions in a substantially inversely proportional relationship at least to the attenuation amount. A plurality of rear loudspeakers receive the medium and high frequency sound region controlling signal from the equalizer and output sound of an attenuation information signal wherein sound in the medium and high frequency sound regions is attenuated.
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Isen Forester W.
Pioneer Electronic Corporation
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