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Listar por palabra clave "Porous material"

Mostrando ítems 1-5 de 5

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 ...
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 ...
Perfect, broadband, and sub-wavelength absorption with asymmetric absorbers: Realization for duct acoustics with 3D printed porous resonators

Boulvert, Jean; Humbert, Thomas; Romero-García, Vicente; Gabard, Gwenael; Fotsing, Edith Roland; Ross, Annie; Mardjono, Jacky; Groby, Jean Philippe (Elsevier, 2022-04-14)

[EN] This article explores, theoretically and experimentally, asymmetric absorbers made of detuned and folded quarter wavelength resonators filled with air or porous materials. When used as acoustic lining in ducts, their ...
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 ...
Transmission, reflection and absorption in Sonic and Phononic Crystals

Cebrecos Ruiz, Alejandro (Universitat Politècnica de València, 2015-10-26)

[EN] Phononic crystals are artificial materials formed by a periodic arrangement of inclusions embedded into a host medium, where each of them can be solid or fluid. By controlling the geometry and the impedance contrast ...