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Transmission of ultrasonic waves through porous layers of high flow resistivity saturated by air

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3 Author(s)
Kelders, Luc ; Lab. voor Akoestiek en Thermische Fysica, Katholieke Univ., Leuven, Heverlee, Belgium ; Lauriks, W. ; Allard, J.F.

Transmission of ultrasonic waves through porous materials of high flow resistivity and porosity (in contact with air at both faces) is modelled and measured for an open-bubble foam at normal and oblique incidence. The importance of the airborne wave and the differences with the case of an elastic nonporous solid are demonstrated. A simple method to measure the shear modulus and the Poisson coefficient of the frame is suggested for similar materials.

Published in:
Ultrasonics, Ferroelectrics and Frequency Control, IEEE Transactions on  (Volume:46 ,  Issue: 1 )

Date of Publication: Jan. 1999

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