Investigation of flanking sound transmission in lightweight building structures using a scanning laser vibrometer

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TypeArticle
Journal titleAcoustics Bulletin
Volume35
Issue4
Pages112; # of pages: 12
SubjectBuilding acoustics, structure-borne sound, structural intensity; Sound transmission & insulation
AbstractIn some cases the overall sound transmission between adjacent dwellings is governed by flanking transmission and hence testing of the flanking performance of building structures is an important issue. Usually the well established indirect measurement method of ISO 10848 is applied for testing junctions of lightweight building elements like wood joist floors and gypsum board walls. Here a full-scale junction is built in a special test facility, some surfaces of the test specimen are shielded, and the sound pressure level difference between the source and receive rooms is measured. An estimate of the flanking sound reduction index of one particular path is obtained by considering the power injection, propagation attenuation of structural waves in the two coupled elements, junction attenuation, and radiation into the receiving room. In this paper a scanning laser vibrometer is used to get a better understanding of flanking transmission in lightweight building structures and of the above-mentioned mechanisms. The spatial distribution of the velocity on the surface of the structure is measured and structural power flow is investigated.
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number53591
21283
NPARC number20374210
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Record identifier715769a8-48d9-44ea-95b4-f075cbdc25ee
Record created2012-07-23
Record modified2016-05-09
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