Determination of transmission and insertion loss for multi-inlet mufflers using impedance matrix and superposition approaches with comparisons

X. Hua, C. Jiang, D. W. Herrin, T. W. Wu

Research output: Contribution to journalArticlepeer-review

22 Scopus citations

Abstract

This paper details how transmission and insertion loss can be defined for the multi-inlet case. Two different procedures are used for calculations and are compared against one another. The first is an impedance matrix method that has been proposed in the past and is especially suitable for deterministic approaches like the boundary element method. The other is a superposition method that does not require assembling or inverting a matrix. Though each method can be extended to the n-inlet situation, the superposition approach is mathematically simpler but requires the source impedance to be known a priori. Transmission and insertion loss can be determined using either method, and results using both are shown to be equivalent. The methods are demonstrated and compared for a two-inlet one-outlet expansion chamber. After which, the superposition method is used to determine the insertion loss for a two-inlet one-outlet generator set muffler experimentally.

Original languageEnglish
Pages (from-to)5680-5692
Number of pages13
JournalJournal of Sound and Vibration
Volume333
Issue number22
DOIs
StatePublished - Oct 27 2014

Bibliographical note

Publisher Copyright:
© 2014 Elsevier Ltd. All rights reserved.

ASJC Scopus subject areas

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

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