title: Reverberation of flexural waves scattered by a local heterogeneity in a plate.
abstract: 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.
authors.affiliation: Institut d'Electronique, Microélectronique et Nanotechnologies (IEMN), Unité Mixte de Recherche, CNRS 8520, Université de Valenciennes et du Hainaut-Cambrésis, F-59313 Valenciennes cedex 9, France.
authors.forename: Hossep
authors.initials: H
authors.lastname: Achdjian
authors.affiliation: Institut d'Electronique, Microélectronique et Nanotechnologies (IEMN), Unité Mixte de Recherche, CNRS 8520, Université de Valenciennes et du Hainaut-Cambrésis, F-59313 Valenciennes cedex 9, France.
authors.forename: Emmanuel
authors.initials: E
authors.lastname: Moulin
authors.affiliation: Institut d'Electronique, Microélectronique et Nanotechnologies (IEMN), Unité Mixte de Recherche, CNRS 8520, Université de Valenciennes et du Hainaut-Cambrésis, F-59313 Valenciennes cedex 9, France.
authors.forename: Farouk
authors.initials: F
authors.lastname: Benmeddour
authors.affiliation: Institut d'Electronique, Microélectronique et Nanotechnologies (IEMN), Unité Mixte de Recherche, CNRS 8520, Université de Valenciennes et du Hainaut-Cambrésis, F-59313 Valenciennes cedex 9, France.
authors.forename: Jamal
authors.initials: J
authors.lastname: Assaad
authors.affiliation: Institut d'Electronique, Microélectronique et Nanotechnologies (IEMN), Unité Mixte de Recherche, CNRS 8520, Université de Valenciennes et du Hainaut-Cambrésis, F-59313 Valenciennes cedex 9, France.
authors.forename: Lucie
authors.initials: L
authors.lastname: Dupont
authors.affiliation: Institut d'Electronique, Microélectronique et Nanotechnologies (IEMN), Unité Mixte de Recherche, CNRS 8520, Université de Valenciennes et du Hainaut-Cambrésis, F-59313 Valenciennes cedex 9, France.
authors.forename: Lynda
authors.initials: L
authors.lastname: Chehami