Apparatus and method for actively reducing noise in vehicular pa

Details Apparatus and method for actively reducing noise in vehicular pa Apparatus and method for actively reducing noise in vehicular pa

1995-04-26

1998-12-15

Chang, Vivian

Electrical audio signal processing systems and devices

Acoustical noise or sound cancellation

Within cabin or compartment of vehicle

381 715, A61F 1106

Patent

active

058504583

ABSTRACT:
In an apparatus and method for actively reducing air intake noise of an air intake system of a vehicular internal combustion engine, a sound wave having approximately the same amplitude, and a phase shifted by 180.degree. from the air intake sound wave, is generated from a sound wave generator to cancel the air intake sound, which is unpleasant to vehicular occupants.

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