Electrical audio signal processing systems and devices – Acoustical noise or sound cancellation – Within duct
Patent
1996-11-04
1998-12-08
Kuntz, Curtis A.
Electrical audio signal processing systems and devices
Acoustical noise or sound cancellation
Within duct
381717, 381718, A01F 1106
Patent
active
058481680
ABSTRACT:
An active noise conditioning system for use with a combustion engine exhaust system is provided. A controller receives an exhaust noise signal, along with various other feedback signals for producing an anti-noise signal in response to the input signals. An amplifier is provided for receiving and amplifying the anti-noise signal. A wave generator receives the amplified anti-noise signal and generates an audio anti-noise signal. The output of the wave generator is collocated with the exhaust pipe of the exhaust system, where the audio anti-noise signal and the exhaust noise are acoustically coupled, which effects cancelling of the exhaust noise.
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Levreault, Jr. John E.
Shipps J. Clay
Kuntz Curtis A.
Lee Ping W.
Tenneco Automotive Inc.
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