Development of a Muffler Insertion Loss Flow Rig

Jonathan Chen, D. W. Herrin

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations


Bench tests are an important step to developing mufflers that perform adequately with acceptable pressure drop. Though the transmission loss of a muffler without flow is relatively simple to obtain using the two-load method, the presence of mean flow modifies the muffler behavior. The development of an insertion loss test rig is detailed. A blower produces the flow, and a silencer quiets the flow. Acoustic excitation is provided by a loudspeaker cluster right before the test muffler. The measurement platform allows for the measurement of flow-induced noise in the muffler. Also, the insertion loss of the muffler can be determined, and this capability was validated by comparison to a one-dimensional plane wave model.

Original languageEnglish
JournalSAE Technical Papers
Issue numberJune
StatePublished - Jun 5 2019
Event2019 SAE Noise and Vibration Conference and Exhibition, NVC 2019 - Grand Rapids, United States
Duration: Jun 10 2019Jun 13 2019

Bibliographical note

Publisher Copyright:
© 2019 SAE International. All Rights Reserved.

ASJC Scopus subject areas

  • Automotive Engineering
  • Safety, Risk, Reliability and Quality
  • Pollution
  • Industrial and Manufacturing Engineering


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