Theoretical and measured attenuation of mufflers at room temperature without flow, with comments on engine-exhaust muffler design

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Description

Equations 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.

Physical Description

111 p. : ill.

Creation Information

Davis, Don D., Jr.; Stevens, George L., Jr.; Moore, Dewey & Stokes, George M. February 1953.

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This report is part of the collection entitled: National Advisory Committee for Aeronautics Collection and one other and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 282 times . More information about this report can be viewed below.

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  • Main Title: Theoretical and measured attenuation of mufflers at room temperature without flow, with comments on engine-exhaust muffler design
  • Series Title: NACA Technical Notes

Description

Equations 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.

Physical Description

111 p. : ill.

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  • Accession or Local Control No: 93R13109
  • URL: http://hdl.handle.net/2060/19930083819 External Link
  • Report No.: NACA-TN-2893
  • Center for AeroSpace Information Number: 19930083819
  • Archival Resource Key: ark:/67531/metadc56964

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National Advisory Committee for Aeronautics Collection

The National Advisory Committee for Aeronautics (NACA) was a U.S. federal agency founded on March 3, 1915 to undertake, promote, and institutionalize aeronautical research. On October 1, 1958 the agency was dissolved, and its assets and personnel transferred to the newly created National Aeronautics and Space Administration (NASA).

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Creation Date

  • February 1953

Added to The UNT Digital Library

  • Nov. 16, 2011, 7:33 a.m.

Description Last Updated

  • April 10, 2018, 7:47 p.m.

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Davis, Don D., Jr.; Stevens, George L., Jr.; Moore, Dewey & Stokes, George M. Theoretical and measured attenuation of mufflers at room temperature without flow, with comments on engine-exhaust muffler design, report, February 1953; (digital.library.unt.edu/ark:/67531/metadc56964/: accessed June 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.