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Article
Complement to standard method for measuring normal incidence sound transmission loss with three microphones
JASA Express Letter (2012)
  • Yacoubou Salissou
  • Raymond Panneton
  • Olivier Doutres, Ph.D.
Abstract
Complement to standard E2611-09 of the American Society for Testing and Materials [Standard Test Method for Measurement of Normal Incidence Sound Transmission of Acoustical Materials Based on the Transfer Matrix Method (American Society for Testing and Materials, New York, 2009)] is proposed in order to measure normal incidence sound transmission loss of materials in a modified impedance tube using a three-microphone two-load or one-load method. The modified tube is a standard two-microphone impedance tube, where a third microphone is mounted on a movable hard termination. This method is conceptually identical to the four-microphone two-load or one-load method described in the standard; however, it requires fewer transfer functions and one microphone less. The method is validated on (1) symmetrical homogeneous and (2) non-symmetrical non-homogeneous specimens.
Keywords
  • Transmission loss,
  • Impedance tube,
  • Aoustic materials,
  • porous
Publication Date
Winter February 8, 2012
Publisher Statement
Copyright (2012) Acoustical Society of America. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the Acoustical Society of America.
Citation Information
Yacoubou Salissou, Raymond Panneton and Olivier Doutres. "Complement to standard method for measuring normal incidence sound transmission loss with three microphones" JASA Express Letter Vol. 131 Iss. 3 (2012)
Available at: http://works.bepress.com/olivier_doutres/32/