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Listar por autor "Romero García, Vicente"

Mostrando ítems 1-20 de 25

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Asymmetric propagation using enhanced self-demodulation in a chirped phononic crystal

Cebrecos, Alejandro; Jimenez, Noe; Romero García, Vicente; Picó Vila, Rubén; Sánchez Morcillo, Víctor José; García-Raffi, L. M. (AIP Publishing, 2016-12)

Asymmetric propagation of acoustic waves is theoretically reported in a chirped phononic crystal made of the combination of two different nonlinear solids. The dispersion of the system is spatially dependent and allows the ...
Band gap creation using quasiordered structures based on sonic crystals

Romero García, Vicente; Fuster García, Elíes; García-Raffi, L. M.; Sánchez Pérez, Enrique Alfonso; Sopena Novales, Mario; Llinares Galiana, Jaime; Sánchez Pérez, Juan Vicente (American Institute of Physics (AIP), 2006)

It is well known that sonic crystals are periodic structures that present acoustic band gaps attenuation centered at frequencies related with the lattice constant of the structure. We present an approach based on genetic ...
Broadband quasi perfect absorption using chirped multi-layer porous materials

Jimenez, Noe; Romero García, Vicente; Cebrecos, Alejandro; Picó Vila, Rubén; Sánchez Morcillo, Víctor José; García-Raffi, L. M. (AIP Publishing, 2016-12)

This work theoretically analyzes the sound absorption properties of a chirped multi-layer porous material including transmission, in particular showing the broadband unidirectional absorption properties of the system. Using ...
Caracterización experimental in situ de la atenuación de las barreras acústicas basadas en cristales de sonido. Aplicación de la especificación técnica CEN/TS 1793-5

Núñez Ferriol, Silvia (Universitat Politècnica de València, 2014-01-27)

Aplicación de la especificación técnica CEN/TS 1793-5 para la evaluación in situ de las propiedades de atenuación acústica de las barreras acústicas basadas en cristales de sonido. Asimismo se recopila y aplica la normativa ...
Comportamiento de barreras de cristales de sonido con dispersores resonantes

Romero García, Vicente; Krynkin, A.; García-Raffi, L. M. (Sociedad Española de Acústica (SEA), 2010)

[EN] During the last few years there has been increasing interest in designing devices for controlling noise. In this work experimental data and numerical simulations are presented for the noise attenuation provided by ...
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. ...
Design, Manufacture and Characterization of an Acoustic Barrier Made of Multi-Phenomena Cylindrical Scatterers Arranged in a Fractal-Based Geometry

Castiñeira Ibáñez, Sergio; Rubio Michavila, Constanza; Romero García, Vicente; Sánchez Pérez, Juan Vicente; García Raffi, Luis Miguel (De Gruyter, 2012)

In this work we present the design and the manufacturing processes, as well as the acoustics standard-ization tests, of an acoustic barrier formed by a set of multi-phenomena cylindrical scatterers. Periodic arrangements ...
Diseño acústico de una sala de grabación de uso personal integrada en una vivienda de Denia

Soler Calatayud, Abel (Universitat Politècnica de València, 2014-01-27)

Propuesta de diseño y acondicionamiento acústico de una sala de grabación ya existente para uso personal situada en la localidad de Denia para su posterior reforma con los cambios propuestos en este proyecto. Actualmente ...
Extraordinary absorption of sound in porous lamella-crystals

Christensen, Johan; Romero García, Vicente; Picó Vila, Rubén; Cebrecos Ruiz, Alejandro; Garcia de Abajo, Francisco Javier; Mortensen, N. A.; Willatzen, M.; Sánchez Morcillo, Víctor José (Nature Publishing Group: Open Access Journals - Option C, 2014-04-14)

We present the design of a structured material supporting complete absorption of sound with a broadband response and functional for any direction of incident radiation. The structure which is fabricated out of porous ...
Formation of collimated sound beams by three-dimensional sonic crystals

Cebrecos Ruiz, Alejandro; Romero García, Vicente; Picó Vila, Rubén; Pérez Arjona, Isabel; Espinosa Roselló, Víctor; Sánchez Morcillo, Víctor José; Staliünas, Kestutis (American Institute of Physics (AIP), 2012-05-15)

[EN] A theoretical and experimental study of the propagation of sound beams in- and behind three-dimensional sonic crystals at frequencies close to the band edges is presented. An efficient collimation of the beam behind ...
Formation of high-order acoustic Bessel beams by spiral diffraction gratings

Jimenez, Noe; Picó Vila, Rubén; Sánchez Morcillo, Víctor José; Romero García, Vicente; García-Raffi, L. M.; Staliünas, Kestutis (American Physical Society, 2016-11-23)

The formation of high-order Bessel beams by a passive acoustic device consisting of an Archimedes' spiral diffraction grating is theoretically, numerically, and experimentally reported in this paper. These beams are ...
Interferometric method of determining the refraction index of two-dimensional sonic crystals

Romero García, Vicente; Fuster García, Elíes; García-Raffi, L. M.; Sánchez Pérez, Juan Vicente; Uris Martínez, Antonio (American Physical Society, 2007)

[EN] Sonic crystals are defined as materials consisting of periodic distributions of acoustic scatterers in another medium with different elastic properties. These materials present two main acoustical features: they present ...
Level repulsion and evanescent waves in sonic crystals

Romero García, Vicente; Vasseur, Jerome; Hladky Hennion, A. C.; García Raffi, Luis Miguel; Sánchez Pérez, Juan Vicente (American Physical Society, 2011-12)

This work theoretically and experimentally reports the evanescent connections between propagating bands in periodic acoustic materials. The complex band structures obtained by solving for the k(¿) problem reveal a complete ...
Matrix formulation in Acoustics: the transfer matrix method

Herrero Durá, Iván; Cebrecos Ruiz, Alejandro; García Raffi, Luis Miguel; Romero-García, Vicente (Universitat Politècnica de València, 2019-07-31)

[EN] Matrices are introduced in mathematical subjects in connection with vector spaces and linear algebra, being disconnected from their applications in other fields of science and engineering studies. The transmission of ...
Metadiffusers for quasi-perfect and broadband sound diffusion

Ballestero, E.; Jimenez, Noe; Groby, J.-P.; Aygun, H.; Dance, S.; Romero-García, V. (American Institute of Physics, 2021-07-26)

[EN] Sound diffusion refers to the ability of a surface to evenly scatter sound energy in both time and space. However, omni-directional radiation of sound, or perfect diffusion, can be impractical or difficult to reach ...
Metamateriaux pour l'acoustique audible : Absorption parfaite et diffusion sublongueur d'onde

Romero-García, Vicente; Pagneux, Vincent; Groby, J.P.; Jimenez, Noe; Ballestero, Eric (Centre d'information et de documentation sur le bruit (France), 2020)

[FR] Dans ce travail, nous montrons les possibilités des métamatériaux acoustiques pour la conception de matériaux structurés sublongueur d'onde dans les cas de l¿absorption parfaite et la diffusion du son. Basé sur les ...
Natural sonic crystal absorber constituted of seagrass (Posidonia Oceanica) fibrous spheres

Barguet, L.; Romero-García, V.; Jimenez, Noe; García-Raffi, L. M.; Sánchez Morcillo, Víctor José; Groby, J.-P. (Nature Publishing Group, 2021-01-12)

[EN] We present a 3-dimensional fully natural sonic crystal composed of spherical aggregates of fibers (called Aegagropilae) resulting from the decomposition of Posidonia Oceanica. The fiber network is first acoustically ...
Nonlinear focusing of ultrasonic waves by an axisymmetric diffraction grating embedded in water

Jimenez, Noe; Romero García, Vicente; Picó Vila, Rubén; García-Raffi, L. M.; Staliünas, Kestutis (American Institute of Physics (AIP), 2015-11-16)

We report the nonlinear focusing of ultrasonic waves by an axisymmetric diffraction grating immersed in water. In the linear regime, the system presents high focal gain (32 dB), with a narrow beam-width and intense side ...
Perfect Absorption in Mirror-Symmetric Acoustic Metascreens

Romero-García, V.; Jimenez, Noe; Groby, J.-P.; Merkel, A.; Tournat, V.; Theocharis, G.; Richoux, O.; Pagneux, V. (American Physical Society, 2020-11)

[EN] 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 ...
Periodic systems as road traffic noise reducing devices: Prototype and standardization

Castiñeira Ibáñez, Sergio; Romero García, Vicente; Sánchez Pérez, Juan Vicente; García-Raffi, L. M. (Gheorghe Asachi Technical University of Iasi, 2015-12)

[EN] The design, the realization of the prototype and the acoustic standardization process of a novel periodic system made up of multiphysical phenomena scatterers as a road traffic noise reducing device are reported in ...