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Article Dans Une Revue Journal of the Acoustical Society of America Année : 2016

Reverberation of flexural waves scattered by a local heterogeneity in a plate

Résumé

A statistical model is proposed to relate the scattering properties of a local heterogeneity in a plate to the statistical properties of scattered and reverberated flexural waves. The contribution of the heterogeneity is isolated through the computation of differential signals consisting of a subtraction of the signals recorded after and before introduction of the heterogeneity. The theoretical expression of the average reverberation envelope of these differential signals is obtained as a function of the scattering cross-section of the heterogeneity. Successful numerical and experimental validations in various cases of canonical heterogeneities with known scattering cross-sections are shown. These satisfying results offer a way to estimate the scattering cross-section of an unknown scatterer from the reverberated differential signals.
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Dates et versions

hal-04087404 , version 1 (14-02-2024)

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Hossep Achdjian, Emmanuel Moulin, Farouk Benmeddour, Jamal Assaad, Lucie Dupont, et al.. Reverberation of flexural waves scattered by a local heterogeneity in a plate. Journal of the Acoustical Society of America, 2016, 140 (1), pp.157-164. ⟨10.1121/1.4954747⟩. ⟨hal-04087404⟩
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