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Article Dans Une Revue Physical Review Applied Année : 2020

Perfect absorption in mirror-symmetric acoustic metascreens

Noé Jiménez
Jean-Philippe Groby
Aurélien Merkel
Vincent Tournat
Georgios Theocharis
Olivier Richoux
Vincent Pagneux

Résumé

Mirror-symmetric acoustic metascreens producing perfect absorption independently of the incidence side are theoretically and experimentally reported in this work. The mirror-symmetric resonant building blocks of the metascreen support symmetric and antisymmetric resonances that can be tuned to be at the same frequency (degenerate resonances). The geometry of the building blocks is optimized to critically couple both the symmetric and the antisymmetric resonances at the same frequency, allowing perfect absorption of sound from both sides of the metascreen. A hybrid analytical model based on the transfer-matrix method and the modal decomposition of the exterior acoustic field is developed to analyze the scattering properties of the metascreen. The resulting geometry is three-dimensionally printed and experimentally tested in an impedance tube. The experimental results agree well with the theoretical predictions, proving the efficiency of these metascreens for the perfect absorption of sound in ventilation problems.
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Dates et versions

hal-03436042 , version 1 (22-11-2021)

Identifiants

Citer

Vicente Romero-García, Noé Jiménez, Jean-Philippe Groby, Aurélien Merkel, Vincent Tournat, et al.. Perfect absorption in mirror-symmetric acoustic metascreens. Physical Review Applied, 2020, 14 (5), pp.054055. ⟨10.1103/PhysRevApplied.14.054055⟩. ⟨hal-03436042⟩
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