Acoustics – Sound-modifying means – Muffler – fluid conducting type
Patent
1981-05-11
1982-11-23
Hix, L. T.
Acoustics
Sound-modifying means
Muffler, fluid conducting type
181251, 181273, 181275, F01N 102, F01N 108
Patent
active
043600751
ABSTRACT:
An exhaust silencer especially for turbo-charged diesel locomotives with a single exhaust outlet combines a straight through exhaust duct preferably diverging to recover velocity pressure and minimize back pressure with dual silencing means including a large expansion tank around the duct tuned to attenuate a fundamental low frequency exhaust noise peak and smaller reactive chambered means in the duct sized to attenuate a selected mid range of higher frequency exhaust noise. Various features are included.
REFERENCES:
patent: 1874326 (1932-08-01), Mason
patent: 3187834 (1965-06-01), Bryson et al.
patent: 3382948 (1968-05-01), Walker et al.
patent: 3503465 (1970-03-01), Kobayashi et al.
patent: 4164266 (1979-08-01), Collin et al.
patent: 4281741 (1981-08-01), Blaser et al.
patent: 4287962 (1981-09-01), Ingard et al.
IAC Bulletin No. 4,1215.0, Industrial Acoustics Co. 1972.
Blaser Dwight A.
Goding David J.
Ingard Karl U.
General Motors Corporation
Hix L. T,.
Outland Robert J.
Tarcza Thomas H.
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