Measuring flow resistivity of porous materials at low frequencies range via acoustic transmitted waves

The Journal of the Acoustical Society of America
Z E A FellahC Depollier

Abstract

An acoustic transmissivity method is proposed for measuring flow resistivity of porous materials having rigid frame. Flow resistivity of porous material is defined as the ratio between the pressure difference across a sample and the velocity of flow of air through that sample per unit cube. The proposed method is based on a temporal model of the direct and inverse scattering problem for the diffusion of transient low-frequency waves in a homogeneous isotropic slab of porous material having a rigid frame. The transmission scattering operator for a slab of porous material is derived from the response of the medium to an incident acoustic pulse. The flow resistivity is determined from the solution of the inverse problem. The minimization between experiment and theory is made in the time domain. Tests are performed using industrial plastic foams. Experimental and numerical results, and prospects are discussed.

References

Feb 25, 2000·The Journal of the Acoustical Society of America·Z E Fellah, C Depollier
Feb 1, 2003·The Journal of the Acoustical Society of America·Z E A FellahC Depollier

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Citations

Oct 5, 2010·The Review of Scientific Instruments·Erick OgamZ E A Fellah
Apr 6, 2013·The Journal of the Acoustical Society of America·Thomas DupontRaymond Panneton
Nov 18, 2011·The Journal of the Acoustical Society of America·M SadoukiC Depollier
Jun 9, 2014·The Journal of the Acoustical Society of America·M SadoukiC Depollier
Jan 3, 2019·The Journal of the Acoustical Society of America·R RoncenC Depollier

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