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Listar por palabra clave "Perfect absorption"

Mostrando ítems 1-7 de 7

Control of bending wave reflection at beam terminations by thermally tunable subwavelength resonators

Raybaud, Guillaume; Ouisse, Morvan; Leng, Julien; Pelat, Adrien; Groby, Jean Philippe; Romero-García, Vicente; Picó Vila, Rubén; Gautier, François (Elsevier, 2022-07-21)

[EN] The perfect absorption of bending waves by thermally tunable subwavelength absorbers is analytically and experimentally demonstrated in this work for a reflection problem in beams. These absorbers are local resonators ...
Design of acoustic metamaterials made of Helmholtz resonators for perfect absorption by using the complex frequency plane

Romero-García, V.; Jimenez, Noe; Theocharis, G.; Achilleos, V.; Merkel, A.; Richoux, O.; Tournat, V.; Groby, J-P; Pagneux, V. (Elsevier, 2020)

[Otros] Dans cette revue, nous présentons des résultats sur l'absorption acoustique parfaite sub-longueur d'onde faisant appel à des métamatériaux acoustiques avec des résonateurs Helmholtz pour différentes configurations. ...
Iridescent Perfect Absorption in Critically-Coupled Acoustic Metamaterials Using the Transfer Matrix Method

Jimenez, Noe; Groby, Jean-Philippe; Pagneux, Vincent; Romero García, Vicente (MDPI AG, 2017)

[EN] The absorption performance of a locally-reacting acoustic metamaterial under oblique incidence is studied. The metamaterial is composed of a slotted panel, each slit being loaded by an array of Helmholtz resonators. ...
Limits of flexural wave absorption by open lossy resonators: reflection and transmission problems

Leng, J.; Gautier, F.; Pelat, A.; Picó Vila, Rubén; Groby, J-P; Romero García, Vicente (IOP Publishing, 2019-05-06)

[EN] The limits of flexural wave absorption by open lossy resonators are analytically and numerically reported in this work for both the reflection and transmission problems. An experimental validation for the reflection ...
Perfect acoustic absorption in deep sub-wavelength structures for the ventilation problems with degenerate resonators

Romero García, Vicente; Jimenez, Noe; Richoux, Olivier; Theocharis, Georgios; Groby, Jean-Philippe; Pagneux, Vincent (German Acoustical Society, 2019-09-13)

[EN] In this work we report a mechanisms providing symmetric perfect acoustic absorption by sub-wavelength structures in the ventilation problem. While in the problem of reflection the mechanism consists in critically ...
Perfect, broadband, and sub-wavelength absorption with asymmetric absorbers: Realization for duct acoustics with 3D printed porous resonators

Boulvert, Jean; Humbert, Thomas; Romero-García, Vicente; Gabard, Gwenael; Fotsing, Edith Roland; Ross, Annie; Mardjono, Jacky; Groby, Jean Philippe (Elsevier, 2022-04-14)

[EN] This article explores, theoretically and experimentally, asymmetric absorbers made of detuned and folded quarter wavelength resonators filled with air or porous materials. When used as acoustic lining in ducts, their ...
Subwavelength Broadband Perfect Absorption for Unidimensional Open-Duct Problems

Meng, Yang; Romero-García, Vicente; Gabard, Gwénaël; Groby, Jean-Philippe; Bricault, Charlie; Goudé, Sébastien (Wiley-VCH Verlag GmbH & Co. KGaA, 2023-06)

[EN] Passive metamaterials provide efficient solutions for sound absorption in the low-frequency regime with deep subwavelength dimensions. They have been extensively applied in unidimensional reciprocal problems considering ...