Improving acoustic wave propagation models in highly attenuating porous materials - Archive ouverte HAL Access content directly
Journal Articles Journal of the Acoustical Society of America Year : 2023

Improving acoustic wave propagation models in highly attenuating porous materials

Zine El Abiddine Fellah
Erick Ogam
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  • PersonId : 854142
Arnaud Duval
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  • PersonId : 1262244

Abstract

This article presents an improved and extended modeling approach for acoustic wave propagation in rigid porous materials, focusing on examples such as plastic foams used for noise reduction in automotive applications. We demonstrate that the classical model (Johnson-Champoux-Allard) in the asymptotic high frequency limit, widely employed in the literature, fail to accurately reconstruct the transmitted acoustic signal through high absorbant porous materials characterized by significant wave attenuation. The study focuses on the airborne ultrasonic frequency range (30-200 kHz). To address this limitation, we introduce new non-acoustic parameters Σ and V , and Σ0 and V for thermal effects, with surface and volumetric dimensions, respectively, allowing for the reconstruction of the transmitted signal and accurate modeling of the pronounced acoustic attenuation within the material. These parameters are incorporated into the expansion on skin depths of the dynamic tortuosity α(ω) and thermal tortuosity α'(ω) response functions, which describe the inertial-viscous and thermal interactions between the fluid and the solid, respectively. This novel modeling approach enables a more comprehensive study of high attenuating porous media, which are crucial for effective noise reduction. Additionally, it opens up new possibilities for characterization beyond the capabilities of current models.
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Dates and versions

hal-04328094 , version 1 (06-12-2023)

Identifiers

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Abdellah Bouchendouka, Zine El Abiddine Fellah, Cong Truc T Nguyen, Erick Ogam, Camille Perrot, et al.. Improving acoustic wave propagation models in highly attenuating porous materials. Journal of the Acoustical Society of America, 2023, p206-217. ⟨10.1121/10.0024008⟩. ⟨hal-04328094⟩
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