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Listar por palabra clave "Insertion loss"

Mostrando ítems 1-13 de 13

A tunable acoustic barrier based on periodic arrays of subwavelength slits

Rubio Michavila, Constanza; Uris Martínez, Antonio; Candelas Valiente, Pilar; Belmar Ibáñez, Francisco; Gómez Lozano, Vicente (American Institute of Physics, 2015)

[EN] The most usual method to reduce undesirable enviromental noise levels during its transmission is the use of acoustic barriers. A novel type of acoustic barrier based on sound transmission through subwavelength slits ...
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 ...
Correlation between objective and subjective assessment of noise barriers

Redondo, Javier; Peiró-Torres, M.P.; Llinares Millán, María Del Carmen; Bravo, Jose Maria; Pereira, A.; Amado-Mendes, P. (Elsevier, 2021-01-15)

[EN] There are several international standards that define the way to evaluate the attenuation capacity of noise reducing devices, by single-number quantities representing airborne sound insulation and insertion loss. These ...
Diseño de pantallas acústicas para reducir costes de fabricación

Segura Mateu, Francisco (Universitat Politècnica de València, 2014-02-24)

El ruido es uno de los problemas medioambientales que mayor preocupación ha generado en los países de la Unión Europea en los últimos años. En consonancia, se han aprobado diversas normativas y legislaciones para intentar ...
Diseño de una pantalla acústica verde abierta para la reducción del ruido.

Calero Pons, Elena (Universitat Politècnica de València, 2021-10-29)

[ES] En este trabajo se presenta una novedosa pantalla vegetal basada en cristales de sonido (CS) la cual, estará formada por distintas especies de árboles que serán los encargados de actuar como centros de dispersión, de ...
Estudio de la influencia del público en los subgraves en espectáculos al aire libre

Roig Ortiz, Pedro Adrián (Universitat Politècnica de València, 2014-01-23)

Entre algunos profesionales del sector de producción de eventos sonoros existe una creencia extendida, y no justificada científicamente, de que tras la inserción del público en el concierto el nivel de presión sonora en ...
High-Directivity and low-loss directional couplers based on Empty Substrate Integrated Coaxial Line Technology

Herraiz, David; Esteban González, Héctor; Herraiz, Darío; de Dios, Juan J.; Fernández, Marcos D.; Belenguer, Ángel; Boria Esbert, Vicente Enrique (Institute of Electrical and Electronics Engineers, 2024)

[EN] High-directivity and low-loss directional couplers, based on Empty Substrate Integrated Coaxial Line (ESICL) technology, are presented in this article. The proposed coupled line direcional couplers, are based on ...
Microwave Filters in Planar and Hybrid Technologies with Advanced Responses

Marín Martínez, Sandra (Universitat Politècnica de València, 2022-10-31)

[ES] La presente tesis doctoral tiene como principal objetivo el estudio, diseño, desarrollo y fabricación de nuevos dispositivos pasivos de microondas, tales como filtros y multiplexores con respuestas avanzadas para ...
Numerical simulation and laboratory measurements on an open tunable acoustic barrier

Rubio Michavila, Constanza; Castiñeira Ibáñez, Sergio; Uris Martínez, Antonio; Belmar Ibáñez, Francisco; Candelas Valiente, Pilar (Elsevier, 2018)

[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 ...
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 ...
Real scale evaluation of vibration mitigation of sub-ballast layers with added tyre-derived aggregate

Martínez Fernández, Pablo; Hidalgo Signes, Carlos; Villalba Sanchis, Ignacio; Pérez Mira, Domingo; Insa Franco, Ricardo (Elsevier, 2018)

[EN] This paper represents a final stage in the assessment of granular sub-ballast materials mixed with tyre-derived aggregate (TDA) without binder material. The objective is to evaluate such mixtures through a full-scale ...
Research of the acoustic phenomenon produced by isolated scatterers and its applicability as a noise reducing device in transport infrastructures. Search for an optimised and sustainable design.

Peiró Torres, María del Pilar (Universitat Politècnica de València, 2021-03-30)

[ES] El control de ruido ambiental es una preocupación de primera magnitud para las sociedades avanzadas, debido a los problemas derivados que ocasionan en la salud de los ciudadanos. Una de las soluciones más extendidas ...
Subwavelength slit acoustic metamaterial barrier

Rubio Michavila, Constanza; Candelas Valiente, Pilar; Belmar Ibáñez, Francisco; Gómez Lozano, Vicente; Uris Martínez, Antonio (IOP Publishing, 2015-10-07)

[EN] Reduction of noise in the transmission path is a very important environmental problem. The standard method to reduce this noise level is the use of acoustic barriers. In this paper, an acoustic metamaterial based on ...