This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
The Modeling and Design of a Reactive Muffler to Reduce a Low Frequency Tone
Technical Paper
2013-01-1885
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Large reciprocating engines produce a tonal spectrum of sound radiating from their exhaust. Even after standard reactive mufflers and after-treatment devices are added, and the target A-weighted sound level has been achieved, very audible low frequency tones can remain, and their levels are sometimes even enhanced by the exhaust system, creating potential annoyance problems in neighboring communities. This paper describes a practical design approach to such a problem and demonstrates variation in critical system parameters that affect acoustical performance. These parameters include temperature, source impedance, end impedance, flow, and pipe lengths, which are explored through practical models. The results of field measurements before and after installation of a final design are included and demonstrate a significant reduction in the sound level at the frequencies of interest.
Recommended Content
Journal Article | Adding Bypass Ducts to Enhance Muffler Performance without Increasing Size |
Technical Paper | Flow Excited Noise Analysis of Exhaust |
Journal Article | Development of High Level Modeling Method for Rapid Modeling Process |
Authors
Citation
Kato, D., Seybert, A., and Jones, D., "The Modeling and Design of a Reactive Muffler to Reduce a Low Frequency Tone," SAE Technical Paper 2013-01-1885, 2013, https://doi.org/10.4271/2013-01-1885.Also In
References
- SIDLAB Software for the Analysis of Sound Propagation inside Duct Systems www.SIDLAB.se
- Spectronics ACUPRO System; Spectronics, Inc., USA www.spectronics.net
- Lyon , R. H , and DeJong , R. G. Theory and Application of Statistical Energy Analysis Second Butterworth-Heinemann 1995
- Stephens , D. G. , Shepherd , K. P. , Hubbard , H. H. , and Grosveld , F. W. Guide to the Evaluation of Human Exposure to Noise from Large Wind Turbines. NASA Technical Memorandum 83288 May 1982
- Stokes , G. M. , and Davis , D. D. NACA Tech Note 2943 1953
- Harris , Cyril M. Handbook of Noise Control McGraw-Hill 1957
- Beranek , L. L. Noise and Vibration Control McGraw-Hill 1971
- Munjal , M. L Acoustics of Ducts and Mufflers John Wiley & Sons 1987
- Xu , M.B. , Selamet , A. , Lee , I. J. , Huff , N.T. Sound Attenuation in Dissipative Expansion Chambers J. Sound Vib. 272 1125 1133 2004