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Browsing by Subject "Sound absorption"

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Browsing by Subject "Sound absorption"

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    A finite element model of perforated panel absorbers including viscothermal effects 
    Carbajo San Martín, Jesús; Ramis Soriano, Jaime; Godinho, Luis; Amado-Mendes, Paulo; Alba Fernández, Jesús (Elsevier, 2015-04-01)
    Most of the analytical models devoted to determine the acoustic properties of a rigid perforated panel consider the acoustic impedance of a single hole and then use the porosity to determine the impedance for the whole ...
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    Acoustic noise reduction methods for the launch pad 
    Herrero Durá, Iván (2020-06-19)
    [ES] Los niveles de presión acústica experimentados por las naves espaciales y las lanzaderas durante las fases iniciales del lanzamiento (ignición de motores y despegue) pueden ser muy significativos para estructuras ...
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    An electroacoustic method for measuring airflow resistivity of porous sound-absorbing materials 
    Alba, Jesus; Arenas, Jorge P.; Rey Tormos, Romina María del; Rodríguez-Vercher, Juan-Carlos (Elsevier, 2019)
    [EN] In this paper, a method for measuring the airflow resistivity of air-saturated porous sound-absorbing materials is presented. The method is based on a modification of the previous device developed by Dragonetti et al. ...
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    An empirical modelling of porous sound absorbing materials made of recycled foam 
    Rey Tormos, Romina María del; Alba Fernández, Jesús; Arenas, Jorge P.; Sanchis Rico, Vicente Jorge (Elsevier, 2012-07)
    Polyurethane foam waste is one of the residues of the manufacturing processes in textile industry, the disposal of which is becoming a severe environmental problem. In this paper the sound absorption properties of different ...
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    An Inverse Method to Obtain Porosity, Fibre Diameterand Density of Fibrous Sound Absorbing Materials 
    Alba Fernández, Jesús; Rey Tormos, Romina María del; Ramis Soriano, Jaime; Arenas, Jorge P. (Polish Scientific Publishers, 2011-09)
    Characterization of sound absorbing materials is essential to predict its acoustic behaviour. The most commonly used models to do so consider the flow resistivity, porosity, and average fibre diameter as parameters to ...
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    Composite Eco-Friendly Sound Absorbing Materials Made of Recycled Textile Waste and Biopolymers 
    Rubino, C.; BONET-ARACIL, MARILÉS; Gisbert Paya, Jaime; Liuzzi, Stefania; Stefanizzi, Pietro; Zamorano Cantó, Manuel; Martellotta, Francesco (MDPI AG, 2019-12-03)
    [EN] In recent years, the interest in reusing recycled fibers as building materials has been growing as a consequence of their ability to reduce the production of waste and the use of virgin resources, taking advantage of ...
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    Estimación de la absorción acústica de paneles fabricados con neumáticos reciclados 
    Segura Alcaraz, Jorge Gabriel; Crespo Amorós, José Enrique; Juliá Sanchis, Ernesto; Nadal Gisbert, Antonio Vicente; Gadea Borrell, José Mª (Federación de Asociaciones de Ingenieros Industriales de España (FAIIE), 2014-01)
    [EN] The present study is conducted to characterize multilayer acoustic panels made from recycled tire rubbers (GTR’s) in order to determine the sound absorption characteristics of these new materials for different ...
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    Estudio numérico de sistemas para la mitigación sonora en la base de lanzamiento de cohetes espaciales durante la fase de despegue 
    Gilabert Ramón, María Teresa (2018-11-05)
    Este trabajo fin de máster consiste en la realización de un estudio numérico mediante elementos finitos sobre sistemas de mitigación sonora del ruido producido por los cohetes espaciales durante la fase de despegue. Este ...
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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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    Nuevos materiales absorbentes acústicos basados en fibra de kenaf 
    Ramis Soriano, Jaime; Alba Fernández, Jesús; Rey Tormos, Romina María del; Escuder Silla, Eva María; Sanchis Rico, Vicente Jorge (Consejo Superior de Investigaciones Científicas (CSIC), 2010)
    Acoustic Standards in the building are responsible for, companies and individuals, propose new acoustic materials for the sound isolation. This paper presents a new sound-absorbent material, it is based on natural fibres, ...
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    Nuevos materiales absorbentes acústicos obtenidos a partir de restosde botellas de plástico 
    Rey Tormos, Romina María del; Alba Fernández, Jesús; Ramis Soriano, Jaime; Sanchis Rico, Vicente Jorge (Consejo Superior de Investigaciones Científicas (CSIC), 2011)
    In the building acoustics field usually fibrous materials are used as sound absorbing materials. Nowadays polyester fiber is one of the most used but the pure chip of polyester has a problem. Polyester is obtained of ...
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    Sound absorption of textile material using a microfibres resistive layer 
    Segura-Alcaraz, María Del Pilar; Bonet-Aracil, M.; Segura Alcaraz, Jorge Gabriel; Montava Segui, I. (IOP Publishing, 2017)
    [EN] Acoustic comfort is a basic human need. One of the adverse effects of noise is its interference with speech discrimination. Textile materials are suitable to be used as sound absorptive materials and thus help to ...
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    Sound absorption properties of unbleached cellulose loose-fill insulation material 
    Arenas, Jorge P.; Rebolledo, Juan; Rey Tormos, Romina María del; Alba Fernández, Jesús (North Carolina State University, 2014-11)
    [EN] Recyclable cellulose loose-fill insulation has been commonly used in heavy timber construction for treating attic areas, under floors, and wall cavities. Through the kraft process, the unbleached cellulose adopts a ...