Computing the attenuation of airborne sound in double- panelled constructions (without coupling betwen panels)

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DOIResolve DOI: http://doi.org/10.4224/20338220
AuthorSearch for:
TypeTechnical Report
ISSN0077-5606
Physical description23 p.
Subjectattenuated wave band; panel construction; air borne sounds; critical frequencies; Acoustics
AbstractThe study describes a simple method for approximating the attenuation of airborne sound in double-panelled constructions. Starting point is a "mass-spring-mass" model patterned after Wintergerst, but using reduced masses instead of true area-related masses. The reduced masses were selected in such a way that as single panels they result in the same attenuation of sound as computed or experimental attenuation for the wall panel in question. Apart from the frequency range directly adjacent to the critical frequency of the panels, there is good agreement between computed and experimental results. An important conclusion is that the resonance frequency of double walls consisting of stiff panels is 3 to 5 times higher that has hitherto been assumed.
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedNo
IdentifierNRC-TT-2000
NRC number776
NPARC number20338220
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Record identifierb70c96fb-f9c5-4366-9813-9a970ff399cf
Record created2012-07-19
Record modified2016-10-03
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