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Listar por palabra clave "Acoustic metamaterials"

Mostrando ítems 1-10 de 10

A Numerical Model of an Acoustic Metamaterial Using the Boundary Element Method Including Viscous and Thermal Losses

Cutanda-Henriquez, V.; Andersen, Peter Risby; Jensen, J. Sondergaard; Juhl, P. Moller; Sánchez-Dehesa Moreno-Cid, José (World Scientific, 2017)

[EN] In recent years, boundary element method (BEM) and finite element method (FEM) implementations of acoustics in fluids with viscous and thermal losses have been developed. They are based on the linearized Navier¿Stokes ...
Acoustics in 2D Spaces of Constant Curvature

Tung, Michael Ming-Sha; Gambi, José M.; María Luisa García del Pino (Springer, 2016-06-17)

[EN] In this work, we will consider a locally homogeneous and isotropic (2+1)D spacetime of Robertson-Walker type and therefore with underlying de Sitter space.
Characterization of avoided crossings in acoustic superlattices: The Shannon entropy in acoustics

Sánchez-Dehesa Moreno-Cid, José; Arias-Gonzalez, J. R. (Frontiers Media, 2022-08-17)

[EN] We show that Shannon's information entropy provides a correct physical insight of localization effects taking place in structured fields fashioned by eigenmodes upon substrate. In particular, we find that the localization ...
Complex Dispersion Relation Recovery from 2D Periodic Resonant Systems of Finite Size

Cebrecos, Alejandro; Romero-García, Vicente; Groby, Jean Philippe (MDPI AG, 2019-02-01)

[EN] The complex dispersion relations along the main symmetry directions of two-dimensional finite size periodic arrangements of resonant or non-resonant scatterers are recovered by using an extension of the SLaTCoW (Spatial ...
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 ...
Particle Swarm Optimization of Resonant Sonic Crystals Noise Barriers

Ramírez-Solana, David; Redondo, Javier; Mangini, Agostino Marcello; Fanti, Maria Pia (Institute of Electrical and Electronics Engineers, 2023-04-17)

[EN] The study of technological materials made by meticulously arranging acoustic elements has received a lot of attention over the past three decades with the goal of generating improved acoustic properties, often going ...
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 ...
Zero-phase propagation in realistic plate-type acoustic metamaterials

Malléjac, M.; Merkel, A.; Sánchez-Dehesa Moreno-Cid, José; Christensen, J.; Tournat, V.; Groby, Jean-Philippe; Romero García, Vicente (American Institute of Physics, 2019-09-23)

[EN] We theoretically, numerically, and experimentally analyze the Density-Near-Zero (DNZ) regime of a one-dimensional acoustic metamaterial. This acoustic metamaterial is composed of thin elastic plates periodically clamped ...