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Communication Dans Un Congrès Année : 2012

Semi-analytical characterisation of a homogeneous rigid frame porous material using P-P probes

Olivier Dazel
Luc Kelders
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Résumé

A new experimental set-up is presented for the characterisation of a homogeneous rigid frame porous material. Acoustical pressures are measured in front of and behind a porous plate using a P-P probe in an anechoic room. The equivalent density $\rho_{eq}(\omega)$ and bulk modulus $K_{eq}(\omega)$ of the porous medium are then analytically recovered from measurements. A numerical inversion procedure using the least square method allows us to obtain a good estimation of the five following acoustical parameters: the porosity $\phi$, the tortuosity $\alpha_\infty$, the flow resistivity $\sigma$, the viscous characteristic length $\Lambda$ and the thermal characteristic length $\Lambda'$.
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Dates et versions

hal-00811164 , version 1 (23-04-2012)

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  • HAL Id : hal-00811164 , version 1

Citer

Bruno Brouard, Jean-Philippe Groby, Damien Parmentier, Olivier Dazel, Luc Kelders, et al.. Semi-analytical characterisation of a homogeneous rigid frame porous material using P-P probes. Acoustics 2012, Apr 2012, Nantes, France. ⟨hal-00811164⟩
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