Evaluation of noise attenuation due to exhaust mufflers

Sreenath, A. V. ; Munjal, M. L. (1970) Evaluation of noise attenuation due to exhaust mufflers Journal of Sound and Vibration, 12 (1). pp. 1-19. ISSN 0022-460X

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Official URL: http://linkinghub.elsevier.com/retrieve/pii/002246...

Related URL: http://dx.doi.org/10.1016/0022-460X(70)90045-3


This paper deals with the evaluation of noise attenuation due to exhaust mufflers fitted to the conventional piston engines. A discussion of the existing methods for the purpose, reveals the undesirability of the assumptions and simplifications implied therein. An expression for the attenuation of a general muffler has been derived. The classical theory of "sound transmission in pipes" [1] has been exploited to evaluate this "expression" for mufflers of different geometry. The quantitative effects of atmospheric impedance, and the engine exhaust impedance on the attenuation curves of a specific muffler have been found for an automotive engine. Finally, attenuation curves of a number of mufflers have been drawn and compared to suggest certain design criteria.

Item Type:Article
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ID Code:73647
Deposited On:07 Dec 2011 05:11
Last Modified:07 Dec 2011 05:11

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