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On the use of a loudspeaker for measuring the viscoelastic properties of sound absorbing materials
J. Acoust. Soc. Am. (Express letter) (2008)
  • Olivier Doutres
  • Nicolas Dauchez
  • Jean-Michel Génevaux
  • Guy Lemarquand
Abstract
This paper investigates the feasibility to use an electrodynamic loudspeaker to determine viscoelastic properties of sound-absorbing materials in the audible frequency range. The loudspeaker compresses the porous sample in a cavity, and a measurement of its electrical impedance allows one to determine the mechanical impedance of the sample: no additional sensors are required. Viscoelastic properties of the material are then estimated by inverting a 1D Biot model. The method is applied to two sound-absorbing materials (glass wool and polymer foam). Results are in good agreement with the classical compression quasistatic method. Copyright (2008) 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.
Publication Date
November, 2008
Citation Information
Olivier Doutres, Nicolas Dauchez, Jean-Michel Génevaux and Guy Lemarquand. "On the use of a loudspeaker for measuring the viscoelastic properties of sound absorbing materials" J. Acoust. Soc. Am. (Express letter) Vol. 124 Iss. 6 (2008)
Available at: http://works.bepress.com/olivier_doutres/4/