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Browsing by Subject "Sonic crystals"

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Browsing by Subject "Sonic crystals"

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    Acoustically penetrable sonic crystals based on fluid-like scatterers 
    Cebrecos Ruiz, Alejandro; Romero García, Vicente; Picó Vila, Rubén; Sánchez Morcillo, Víctor José; Botey, M.; Herrero, R.; Cheng, Y. C.; Staliünas, Kestutis (IOP Publishing: Hybrid Open Access, 2015-01-21)
    We propose a periodic structure that behaves as a fluid fluid composite for sound waves, where the building blocks are clusters of rigid scatterers. Such building-blocks are penetrable for acoustic waves, and their properties ...
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    Analytical model to predict the effect of a finite impedance surface on the propagation properties of 2D Sonic Crystals 
    Romero García, Vicente; Sánchez Pérez, Juan Vicente; García Raffi, Luis Miguel (IOP Publishing: Hybrid Open Access, 2011)
    The use of sonic crystals (SCs) as environmental noise barriers has certain advantages from both the acoustical and the constructive points of view with regard to conventional ones. However, the interaction between the SCs ...
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    Broadband reduction of the specular reflections by using sonic crystals: A proof of concept for noise mitigation in aerospace applications 
    García-Raffi, L. M.; Salmerón-Contreras, L.J.; Herrero-Durá, Iván; Picó Vila, Rubén; Redondo, Javier; Sánchez Morcillo, Víctor José; Staliunas, Kestutis; Adkins, N.J.; Cebrecos, Alejandro; Jimenez, Noe; Romero García, Vicente (Elsevier, 2018-02)
    [EN] The broadband reduction of the specular reflections by sonic crystals (SCs) is theoretically and experimentally reported in this work. The analysed system consists of a sound source radiating a SC made of acoustically ...
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    Broadband sound absorption by lattices of microperforated cylindrical shells 
    García Chocano, Víctor Manuel; Cabrera García, Suitberto; Sánchez-Dehesa Moreno-Cid, José (American Institute of Physics, 2012-10-29)
    Absorption of broadband noise by sonic crystals consisting of microperforated cylindrical shells is proposed and experimentally demonstrated. The theoretical study has been performed in the framework of multiple scattering ...
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    Diseño y modelado de pantallas acústicas basadas en cristales de sonido 2D para ruido de ferrocarril 
    Atiénzar Navarro, Roberto (Universitat Politècnica de València, 2016-11-28)
    _ En la presente Tesina Fin de Máster se va a realizar un trabajo de simulación del comportamiento acústico de una nueva generación de pantallas acústicas basadas en cristales de sonido (CS) para controlar el ruido de ...
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    Enhanced inertia from lossy effective fluids using multi-scale sonic crystals 
    Guild, Matthew; García Chocano, Víctor Manuel; Kan, Weiwei; Sánchez-Dehesa Moreno-Cid, José (American Institute of Physics, 2014-12)
    n this work, a recent theoretically predicted phenomenon of enhanced permittivity with electromagnetic waves using lossy materials is investigated for the analogous case of mass density and acoustic waves, which represents ...
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    Enhanced of sound by soft reflections in exponentially chirped crystals 
    Cebrecos Ruiz, Alejandro; Picó Vila, Rubén; Sánchez Morcillo, Víctor José; Staliünas, Kestutis; Romero García, Vicente; García-Raffi, L. M. (American Institute of Physics (AIP): Open Access Journals, 2014-12)
    The enhancement of sound inside a two dimensional exponentially chirped crystal during the soft reflections of waves is experimentally and theoretically explored in this work. The control of this enhancement is achieved ...
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    Estudio de la percepción sonora en salas acondicionadas con difusores basados en cristales de sonido 
    Hervás Zafra, Blanca (Universitat Politècnica de València, 2016-05-27)
    [EN] Some authors have realised recently about the potential of applying a periodic structure, called sonic crystals, as sound diffusers also been shown that it significantly modify the sound field within a room. This ...
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    Estudio de las aplicaciones de los difusores de sonido basados en cristales de sonido 
    Fuster Fajardo, José Miguel (Universitat Politècnica de València, 2014-01-21)
    Uno de los objetivos en la Acústica de Salas consiste en la creación de un campo sonoro difuso. Los difusores de sonido pueden mejorar el rendimiento acústico de las salas, aumentando la difusión del campo sonoro, la ...
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    Estudio numérico de la focalización de ondas evanescentes con una estructura periódica 
    Tomàs Ibiza, Fernando (Universitat Politècnica de València, 2013-11-26)
    Los cristales fonónicos y sónicos han generado un creciente interés científico para aplicaciones tecnológicas muy diversas. Estos cristales están compuestos de distribuciones periódicas de dispersores embebidos en una ...
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    Evanescent waves and deaf bands in sonic crystals 
    Romero García, Vicente; García Raffi, Luis Miguel; Sánchez Pérez, Juan Vicente (American Institute of Physics, 2011)
    The properties of sonic crystals (SC) are theoretically investigated in this work by solving the inverse problem k(¿) using the extended plane wave expansion (EPWE). The solution of the resulting eigenvalue problem gives ...
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    Evidences of spatial (angular) filtering of sound beams by sonic crystals 
    Picó Vila, Rubén; Pérez Arjona, Isabel; Sánchez Morcillo, Víctor José; Staliünas, Kestutis (Elsevier, 2013-07)
    We report experimental evidences of spatial (angular) filtering of sound beams propagating through sonic crystals. We show that at specific frequencies of the incident wave the paraxial plane wave compo- nents of the beam ...
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    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 ...
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    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 ...
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    Metadiffusers: Deep-subwavelength sound diffusers 
    Jimenez, Noe; Cox, Trevor J.; Romero García, Vicente; Groby, J.P. (Nature Publishing Group, 2017-07-14)
    [EN] We present deep-subwavelength diffusing surfaces based on acoustic metamaterials, namely metadiffusers. These sound diffusers are rigidly backed slotted panels, with each slit being loaded by an array of Helmholtz ...
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    Noise control by sonic crystal barriers made of recycled materials 
    Sánchez-Dehesa Moreno-Cid, José; García Chocano, Víctor Manuel; Torrent Martí, Daniel; Cervera Moreno, Francisco Salvador; Cabrera García, Suitberto; Simon, Francisco (Acoustical Society of America, 2011-03)
    A systematic study of noise barriers based on sonic crystals made of cylinders that use recycled materials like absorbing component is reported here. The barriers consist of only three rows of perforated metal shells filled ...
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    Nonlinear self-collimated sound beams in sonic crystals 
    Hamham, El Mokhtar; Jimenez, Noe; Picó Vila, Rubén; Sánchez Morcillo, Víctor José; García-Raffi, L. M.; Staliünas, Kestutis (American Physical Society, 2015-08-06)
    We report the propagation of high-intensity sound beams in a sonic crystal, under self-collimation or reduced-divergence conditions. The medium is a fluid with elastic quadratic nonlinearity, where the dominating nonlinear ...
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    On the control of propagating acoustic waves in sonic crystals: analytical, numerical and optimization techniques 
    Romero García, Vicente (Universitat Politècnica de València, 2010-12-15)
    El control de las propiedades acústicas de los cristales de sonido (CS) necesita del estudio de la distribución de dispersores en la propia estructura y de las propiedades acústicas intrínsecas de dichos dispersores. En ...
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    Open noise barriers based on sonic crystals. Advances in noise control in transport infrastructures 
    Peiró-Torres, María Del Pilar; Redondo, Javier; Bravo Plana-Sala, José Mª; Sánchez Pérez, Juan Vicente (Elsevier, 2016)
    Noise control is an environmental problem of first magnitude nowadays. In this work, we present a new concept of acoustic screen designed to control the specific noise generated by transport infrastructures, based on new ...
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    Optimization of the performance of acoustic screens based on sonic crystals 
    Alvarez Hurtado, David (Universitat Politècnica de València, 2019-09-03)
    [EN] The purpose of the present work is to explore the applicability of sonic crystals as acoustic screens in order to reduce the traffic noise in open spaces. For that purpose a Multiple Scattering algorithm is used in ...