Acoustics – Auditorium
Patent
1973-11-01
1976-08-31
Gonzales, John
Acoustics
Auditorium
181 47B, F01N 100
Patent
active
039774937
ABSTRACT:
An exhaust control method and apparatus for controlling the exhaust flow of an internal combustion engine to increase engine efficiency and power while suppressing the sound of the exhaust by both absorbing and canceling sound waves.
REFERENCES:
patent: 1874326 (1932-08-01), Mason
patent: 3113635 (1963-12-01), Allen et al.
patent: 3212603 (1965-10-01), Walker
patent: 3602333 (1971-08-01), Kobayashi et al.
patent: 3754619 (1973-08-01), McCormick
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