Acoustic transducer for automotive noise cancellation

Details Acoustic transducer for automotive noise cancellation Acoustic transducer for automotive noise cancellation

1990-12-05

1993-10-19

Ng, Jin F.

Electrical audio signal processing systems and devices

Acoustical noise or sound cancellation

Adjacent ear

381152, 381162, 381202, A61F 1106

Patent

active

052553213

ABSTRACT:
An acoustic transducer is disclosed for incorporation into an engine exhaust system or other gas carrying duct. The transducer produces pressure variations within the duct in accordance with an applied electrical signal. The transducer is especially suitable for use as part of a noise cancellation system whereby inverse pressure variations produced by the transducer cancel noise propagating in the duct. The design of the transducer allows its use when the duct is one carrying high temperature gases such as an automobile exhaust pipe.

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