Single cavity automobile muffler

Details Single cavity automobile muffler Single cavity automobile muffler

1992-05-04

1993-12-21

Gellner, Michael L.

Acoustics

Sound-modifying means

By wave interference

381 71, F01N 106

Patent

active

052722864

ABSTRACT:
A noise suppression system for use on internal combustion engines and small enough for use in automotive applications is disclosed. A cancellation noise generator and actuator speakers produce a noise to combine with and cancel the engine noise carried in exhaust gases in a mixing chamber. The resultant noise leaving the mixing chamber is measured by a circular tubular microphone array to control the noise generator.

REFERENCES:
patent: 3712412 (1973-01-01), Hassett et al.
patent: 3936606 (1976-02-01), Wanke
patent: 4044203 (1977-08-01), Swinbanks
patent: 4177874 (1979-12-01), Angelini et al.
patent: 4527282 (1985-07-01), Chaplin et al.
patent: 4665549 (1987-05-01), Eriksson et al.
"CME Chartered Mechanical Engineer, Anti-Sound The Essex Breakthrough," Jan. 1983 by Noise Cancellation Technologies, Inc.

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