Electrical audio signal processing systems and devices – Acoustical noise or sound cancellation – Counterwave generation control path
Patent
1996-12-03
1999-06-29
Chang, Vivian
Electrical audio signal processing systems and devices
Acoustical noise or sound cancellation
Counterwave generation control path
H03B 2900
Patent
active
059179198
ABSTRACT:
The present invention is directed to a system and method for feed-forward active control of noise and vibration. In operation, at least one of noise and vibration from potential noise and vibration sources are detected, and noise reference data based on the detection of noise and vibration from the potential noise and vibration sources is generated. Further, at least one of noise and vibration at a selected environment in which noise and vibration are to be minimized are also detected, whereby error data based on the detection of noise and vibrations at the selected environment is generated. Filter constants are generated based on the noise reference data and the error data, wherein the generating of the filter constants includes the elimination of redundancies in the noise reference data. The noise reference data is processed based on the generated filter constants, whereby noise/vibration canceling outputs based on the processed noise reference data is generated to minimize energy of the noise and vibration detected at the selected environment.
REFERENCES:
patent: 5209237 (1993-05-01), Rosenthal
patent: 5577127 (1996-11-01), Van Overbeek
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