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Recolector de Ciencia Abierta, RECOLECTA
Conference object . 2008 . Peer-reviewed
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Recolector de Ciencia Abierta, RECOLECTA
Conference object . 2001 . Peer-reviewed
Data sources: Recolector de Ciencia Abierta, RECOLECTA
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Conference object . 2008 . Peer-reviewed
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Acoustical Absorption and Critical Thickness

descriptionPublicationkeyboard_double_arrow_right Conference object 01 Jan 2001 English Publisher:Acoustical Society of Italy
Authors: Pfretzschner, Jaime; Rodríguez Alves, Rosa M.;

handle: 10261/5634

Acoustical Absorption and Critical Thickness

Abstract

This paper presents a theoretical and experimental study that shows the presence of a horizontal asymptote of the absorption coefficient function α(f) in relation with the thickness of the sample. This asymptote conduces to the existence of a critical depth, characterized by a certain attenuation of the sound wave, that limits the absorbing properties of the material. Above this thickness, α(f) does not change noticeably and a progressive increase of the layer thickness only means an unnecessary waste of acoustic material.

This work has been partially supported by the National Research and Development (R&D) Program within the Project AMB..98-1029-C04-01.

Communication presented at the 17th International Congress on Acoustics, Rome, 2-7 September 2001.

Peer reviewed

Related Organizations
Keywords

Critical depth, Absorption coefficient function, Acoustical absorption, Porous acoustic materials, Thickness

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