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Article Dans Une Revue Journal of the Acoustical Society of America Année : 2003

Direct and inverse scattering of transient acoustic waves by a slab of rigid porous material

Résumé

This paper provides a temporal model of the direct and inverse scattering problem for the propagation of transient ultrasonic waves in a homogeneous isotropic slab of porous material having a rigid frame. This new time domain model of wave propagation takes into account the viscous and thermal losses of the medium as described by the model of Johnson et al. ͓D. L. Johnson, J. Koplik, and R. Dashen, J. Fluid. Mech. 176, 379 ͑1987͔͒ and Allard ͓J. F. Allard ͑Chapman and Hall, London, 1993͔͒ modified by a fractional calculus based method applied in the time domain. This paper is devoted to the analytical calculus of acoustic field in a slab of porous material. The main result is the derivation of the expression of the scattering operators ͑reflection and transmission͒ which are the responses of the medium to an incident acoustic pulse. In this model the reflection operator is the sum of two contributions: the first interface and the bulk of the medium. Experimental and numerical results are given as a validation of our model.
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Dates et versions

hal-04230396 , version 1 (05-10-2023)

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Zine El Abiddine Fellah, M Fellah, W Lauriks, C Depollier. Direct and inverse scattering of transient acoustic waves by a slab of rigid porous material. Journal of the Acoustical Society of America, 2003, 113, pp.61 - 72. ⟨10.1121/1.1528592⟩. ⟨hal-04230396⟩
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