[EN] In this work, we report the focusing effect of a 2D sonic crystal cuboid. The proposed sonic composite lens is vertically extended from a 2-D flat Phononic Crystal Structure, but it is found to be able to focus waves ...
[EN] Diffraction at the upper edge of a two-dimensional periodic array of finite rigid cylinders immersed in air as well as the effect on its wave propagation properties are numerically and experimentally reported in this ...
The improvement in focusing capabilities of a set of annular scatterers arranged in a
fractal geometry is theoretically quantified in this work by means of the finite element method
(FEM). Two different arrangements of ...
[EN] The focusing properties of Fresnel Zone Plates (FZPs) against frequency are analyzed in this work. It is shown that the FZP focal length depends almost linearly on the operating frequency.
Focal depth and focal ...
Ramírez Solana, David(Universitat Politècnica de València, 2020-09-15)
[ES] Las barreras acústicas basadas en cristales de sonido constituyen una de las apuestas tecnológicas más prometedoras de los últimos años en el campo de la acústica ambiental. Los cristales de sonidos se pueden definir ...
Ribes Blanco, Daniel(Universitat Politècnica de València, 2019-10-29)
[ES] En este trabajo se cuestiona sobre la necesidad de uno de los instrumentos afines
al trombón tenor, el trombón alto, que junto al bajo y el tenor, ha sido una
formación la cual ha existido desde las primeras orquestas ...
Castiñeira Ibáñez, Sergio(Universitat Politècnica de València, 2015-03-31)
Una de las soluciones para el control del ruido ambiental en la fase de transmisión viene dada
por la utilización de barreras acústicas. En los últimos años, la posibilidad de manipular el
sonido a través de estructuras ...
[EN] In this work, we present a bifocal Fresnel zone plate (BiFZP) capable of generating focusing profiles with two different foci. The performance of the BiFZP is demonstrated in the ultrasound domain, with a very good ...
Castiñeira Ibáñez, Sergio(Universitat Politècnica de València, 2020-02-14)
Objeto de aprendizaje orientado al entendimiento tanto físico como matemático del proceso de carga de un condensador en corriente continua, dentro de la unidad temática del Electromagnetismo.
Este vídeo facilita la ...
Castiñeira Ibáñez, Sergio(Universitat Politècnica de València, 2020-02-14)
Objeto de aprendizaje orientado al entendimiento tanto físico como matemático del proceso de carga de una bobina o autoinducción en corriente continua, dentro de la unidad temática del Electromagnetismo.
Este vídeo ...
Castiñeira Ibáñez, Sergio; Tarrazó Serrano, Daniel(Universitat Politècnica de València, 2020-06-10)
El condensador es un elemento muy utilizado en electromagnetismo. Conocer cómo se puede descargar es muy importante para entender muchas situaciones reales. En este objeto de aprendizaje se muestra analíticamente cómo es ...
[EN] The image performance of acoustic and ultrasound sensors depends on several fundamental parameters such as depth of focus or lateral resolution. There are currently two different types of acoustic diffractive lenses: ...
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 ...
A new generation of acoustic barriers is being introduced into the noise control market. These barriers,
based on arrays of isolated scatterers, present interesting properties to be used in cities to reduce the
transmitted ...
Romero García, Vicente; Sánchez Pérez, Juan Vicente; Castiñeira Ibáñez, Sergio; García-Raffi, L. M.(American Institute of Physics (AIP), 2010)
We show both experimentally and theoretically the evanescent behavior of modes in the band gap of finite phononic crystal (PC). Based on experimental and numerical data we obtain the imaginary part of the wave vector in ...
Castiñeira Ibáñez, Sergio; Rubio Michavila, Constanza(Universitat Politècnica de València, 2020-06-10)
Dada la necesidad del buen uso de la energía eléctrica, se explica la mejora del factor de potencia en instalaciones eléctricas (monofásicas) de corriente alterna para conseguir este fin. Una de las formas más sencilla de ...
[EN] Zone plate lenses are used in many areas of physics where planar geometry is advantageous in comparison with conventional curved lenses. There are several types of zone plate lenses, such as the well-known Fresnel ...
[EN] A new open, thin and low frequency acoustic barrier is presented. These barriers, based on arrays of isolated pickets produce high acoustic attenuation in a selective range of frequencies related to their geometry and ...
[EN] The possibility of modulating the ultrasound beam produced by a transducer through lenses has become
an important task. The fact that these lenses are flat, facilitates their design, construction and applications. ...
Castiñeira Ibáñez, Sergio; Romero García, Vicente; Sánchez Pérez, Juan Vicente; García-Raffi, L. M.(European Physical Society, 2010-11)
The transmission of acoustic waves in a fractal distribution of rigid scatterers embedded in air is reported in this work. The Sierpinsky fractal is used to produce a compact small device containing several periodicities, ...