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Acoustic absorbent panels with low perforation coefficient

AuthorsPfretzschner, Jaime; Simón, Francisco; Colina, Carlos de la
KeywordsAcoustic absorbent panels
Perforated supporting plates
Perforation coefficients
Absortium spectrum degradation
Issue DateSep-2004
PublisherSociedade Portuguesa de Acústica
CitationXXXV Congreso Español de Acústica – TecniAcústica 2004. Acoustics of materials; ID48
AbstractUsually, 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.
Description8 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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