RiuNet UPV Home
:
Browsing by Author

Search RiuNet

Browse

All of RiuNet

My Account

RiuNet Help

Admin. UPV

Browsing by Author "Cebrecos Ruiz, Alejandro"

Now showing items 1-20 of 24

Acoustic Bessel-like beam formation by an axisymmetric grating

Jimenez, Noe; Romero García, Vicente; Picó Vila, Rubén; Cebrecos Ruiz, Alejandro; Sánchez Morcillo, Víctor José; García-Raffi, L. M.; Sánchez Pérez, Juan Vicente; Staliünas, Kestutis (European Physical Society, 2014-04)

We report Bessel-like beam formation of acoustic waves by means of an axisymmetric grating of rigid tori. The results show that the generated beam pattern is similar to that of Bessel beams, characterized by elongated ...
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 ...
Análisis numérico y experimental de estructuras periódicas formadas por materiales absorbentes

Plumed Lorente, Álvaro (Universitat Politècnica de València, 2014-11-27)

Las estructuras periódicas, son conocidas en acústica por los fenómenos generados en la propagación de ondas de presión a través de estas, consiguiendo fenómenos físicos como cancelación del sonido, focalización, uso ...
Angular bandgaps in sonic crystals: evanescent waves and spatial complex dispersion relation

Romero García, Vicente; Picó Vila, Rubén; Cebrecos Ruiz, Alejandro; Staliünas, Kestutis; Sánchez Morcillo, Víctor José (American Society of Mechanical Engineers (ASME), 2013-08)

Phononic crystals are artificial materials made of a periodic distribution of solid scatterers embedded into a solid host medium with different physical properties. An interesting case of phononic crystals, known as sonic ...
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 ...
Beamforming for large-area scan and improved SNR in array-based photoacoustic microscopy

Cebrecos, Alejandro; García-Garrigós, J. J.; Descals, A.; Jimenez, Noe; Benlloch Baviera, Jose María; Camarena Femenia, Francisco (Elsevier, 2021)

[EN] Beamforming enhances the performance of array-based photoacoustic microscopy (PAM) systems for large-area scan. In this study, we quantify the imaging performance of a large field-of-view optical-resolution ...
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 ...
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 ...
Caracterización y adaptación de impedancia eléctrica de transductores de Langevin montados en placa vibrante para limpieza ultrasónica

Pascual Bajo, Alfredo (Universitat Politècnica de València, 2014-02-14)

El objetivo del proyecto es ver cómo se comporta la placa en relación a su consumo eléctrico, es decir la potencia que consume, en que frecuencias consume más, y a qué es debido. Para lo que usaremos los datos que obtengamos ...
Comprobación y validación del Código Técnico de la Edificación en las aulas docentes del Campus de Gandía

Cebrecos Ruiz, Alejandro (Universitat Politècnica de València, 2017-07-18)

El objeto del proyecto que se redacta a continuación es realizar una revisión de las soluciones constructivas del Campus de Gandía, con el fin de valorar las condiciones actuales respecto al nuevo CTE y las necesidades ...
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 ...
Enhanced transmission band in periodic media with loss modulation

Cebrecos Ruiz, Alejandro; Picó Vila, Rubén; Romero García, Vicente; Yasser, A. M.; Maigyte, L.; Herrero, R.; Botey, M.; Sánchez Morcillo, Víctor José; Staliünas, Kestutis (American Institute of Physics (AIP), 2014-11-17)

We study the propagation of waves in a periodic array of absorbing layers. We report an anomalous increase of wave transmission through the structure related to a decrease of the absorption around the Bragg frequencies. ...
Enhancement of sound in chirped sonic crystals

Romero García, Vicente; Picó Vila, Rubén; Cebrecos Ruiz, Alejandro; Sánchez Morcillo, Víctor José; Staliünas, Kestutis (American Institute of Physics (AIP), 2013)

We propose and experimentally demonstrate a mechanism of sound wave concentration based on soft reflections in chirped sonic crystals. The reported controlled field enhancement occurs at around particular (bright) planes ...
Estimación indirecta del target strength (TS) con ecosondas científicas de haz simple

Cebrecos Ruiz, Alejandro (Universitat Politècnica de València, 2011-03-14)

El objetivo de este trabajo es desarrollar y comprobar la fiabilidad de una aplicación de procesado pensada para la medida indirecta de la potencia de blanco (TS) de peces, con vistas a la integración de ésta en una ecosonda ...
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 ...
Estudio numérico y experimental para evaluar el rendimiento de algoritmos de reconstrucción de imagen empleados en tomografía fotoacústica

Pi Martín, Irene (Universitat Politècnica de València, 2021-09-13)

[ES] La tomografía fotoacústica (PAT) es una modalidad emergente de imagen biomédica de alta resolución con gran potencial clínico que combina el uso de técnicas ópticas y acústicas para la formación de imágenes de tejido ...
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 ...
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 ...
Sound absorption and diffusion by 2D arrays of Helmholtz resonators

Herrero-Durá, Iván; Cebrecos, Alejandro; Picó Vila, Rubén; Romero-García, Vicente; García-Raffi, L. M.; Sánchez Morcillo, Víctor José (MDPI AG, 2020-03)

[EN] We report a theoretical and experimental study of an array of Helmholtz resonators optimized to achieve both efficient sound absorption and diffusion. The analysis starts with a simplified 1D model where the plane ...