Title: Evaluation of tortuosity in acoustic porous materials saturated by air
Authors: Allard, Jean Fran├žois ×
Castagnede, B
Henry, M
Lauriks, Walter #
Issue Date: Mar-1994
Publisher: Amer inst physics
Series Title: Review of scientific instruments vol:65 issue:3 pages:754-755
Abstract: Tortuosity is an important parameter for the prediction of the acoustical properties of porous sound absorbing materials. The evaluation of tortuosity by resistivity measurements is now used in several laboratories, although this method presents several drawbacks. In particular, the complete saturation by a conducting fluid of a porous foam having a high flow resistivity is difficult to obtain without partially damaging the structure of the cells. A simple technique based on ultrasonic wavespeed measurements in a material saturated by air is described. This method has been used previously only for water or superfluid helium saturated materials.
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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