A multidomain boundary element solution for silencer and muffler performance prediction

C. Y.R. Cheng, A. F. Seybert, T. W. Wu

Research output: Contribution to journalArticlepeer-review

85 Scopus citations


The multidomain boundary element technique is used for the analysis of muffler problems in which the acoustic region consists of thin obstacles, such as extended inlet or outlet tubes and internal connecting tubes. In this technique, a muffler is first divided into several subdomains and then the well-known Helmholtz integral equation is applied to each subdomain. Continuity conditions of acoustic pressure and normal velocity are enforced at the interface between two neighboring subdomains. A set of simultaneous linear equations can then be constructed and solved for the boundary unknowns, as well as the interface variables. The boundary element solution is compared with a finite element solution. Excellent agreement between these two solutions is observed in producing the transmission loss curves for different muffler configurations.

Original languageEnglish
Pages (from-to)119-129
Number of pages11
JournalJournal of Sound and Vibration
Issue number1
StatePublished - Nov 22 1991

Bibliographical note

Funding Information:
The authors would like to thank Dr D. F. Ross of Garrett Turbine Engine Company for providing the finite element data reported in this paper. This work was supported by NSF grant MSM-8810909.

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Acoustics and Ultrasonics
  • Mechanical Engineering


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