Title: Acoustical measurement of the trapping constant of porous materials
Authors: Debray, A ×
Allard, Jean Fran├žois
Lauriks, Walter
Kelders, Luc #
Issue Date: Dec-1997
Publisher: Amer inst physics
Series Title: Review of scientific instruments vol:68 issue:12 pages:4462-4464
Abstract: A simple method of measuring the trapping constant of porous materials saturated by air is presented. The trapping constant is evaluated from acoustical measurements of the imaginary part of the compressibility of the saturating air at low frequencies. Measurements performed on random packings of spheres are compared with predictions obtained from numerical simulations. Conversely, the connection between the behavior of the compressibility and a well defined physical parameter provides new information about the efficiency of porous sound absorbing materials at low frequencies. (C) 1997 American Institute of Physics.
ISSN: 0034-6748
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Soft Matter and Biophysics
× corresponding author
# (joint) last author

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