Measuring bulk properties of sound-absorbing materials using the two-source method

Z. Tao, D. W. Herrin, A. F. Seybert

Research output: Contribution to journalConference articlepeer-review

8 Scopus citations


The two-source method was used to measure the bulk properties (complex characteristic impedance and complex wavenumber) of sound-absorbing materials, and results were compared to those obtained with the more commonly used two-cavity method. The results indicated that the two-source method is superior to the two-cavity method for materials having low absorption. Several applications using bulk properties are then presented. These include: (1) predicting the absorptive properties of an arbitrary thickness absorbing material or (2) layered material and (3) using bulk properties for a multi-domain boundary element analysis.

Original languageEnglish
JournalSAE Technical Papers
StatePublished - 2003
EventNoise and Vibration Conference and Exhibition - Traverse City, MI, United States
Duration: May 5 2003May 8 2003

ASJC Scopus subject areas

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


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