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Theoretical and Measured Attenuation of Mufflers at Room Temperature Without Flow, with Comments on Engine-exhaust Muffler DesignEquations are presented for the attenuation characteristics of several types of mufflers. Experimental curves of attenuation plotted against frequency are presented for 77 different mufflers and the results are compared with theory. The experiments were made at room temperature without flow and the sound source was a loud-speaker. A method is given for including the tail pipe in the calculations. The application of the theory to the design of engine-exhaust mufflers is discussed, and charts have been included for the assistance of the designer.
Document ID
19930083819
Acquisition Source
Legacy CDMS
Document Type
Other
Authors
Davis, Don D , Jr
Stevens, George L , Jr
Moore, Dewey
Stokes, George M
Date Acquired
August 16, 2013
Publication Date
February 1, 1953
Report/Patent Number
NACA-TN-2893
Accession Number
93R13109
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Keywords
NOISE

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