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Open Access item Acoustic absorbent panels with low perforation coefficient

Authors:Pfretzschner, Jaime
Simón, Francisco
Colina, Carlos de la
Keywords:Acoustic absorbent panels, Perforated supporting plates, Perforation coefficients, Absortium spectrum degradation
Issue Date:Sep-2004
Publisher:Sociedade Portuguesa de Acústica
Citation:XXXV Congreso Español de Acústica – TecniAcústica 2004. Acoustics of materials; ID48
Abstract:Usually, acoustic absorbent panels consist of perforated supporting plates that act like support of absorbent materials. The perforation coefficient of the panels must be higher than 20 % for not to alter the acoustic properties of the used absorbents. At the present time, and for aesthetic reasons, perforated panels with perforation coefficients lower than 10% are preferred, which leads to a remarkable degradation of the absorption spectrum of the whole set. The present work studies the absorption spectra changes of these devices based on the acoustic characteristics of the absorbers used and on the perforation coefficients of the supporting panels.
Description:8 pages, 8 figures.-- Comunicación presentada en: XXXV Congreso Español de Acústica – TecniAcústica 2004, IV Congreso Iberoamericano de Acústica, IV Congreso Ibérico de Acústica y EAA Symposium "Environmental and Architectural Acoustics" (Guimaraes, 14-17 Sep 2004).
Appears in Collections:(IA) Comunicaciones congresos

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