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Effect of structural changes on acoustic performance of wood frame walls

From National Research Council Canada

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Affiliation
  1. National Research Council of Canada. NRC Institute for Research in Construction
FormatText, Article
ConferenceEURONOISE: 10 June 2012, Prague, Czech Republic
SubjectOffice acoustics
Abstract
Sometimes in wood frame construction wall assemblies are required that have a higher axial loadbearing capacity than conventional loadbearing wall designs. To increase the axial load bearingcapacity to carry higher vertical loads, i.e. dead load or traffic load of upper building storeys, theframing has to be stronger, which can be achieved by either decreasing the spacing of the studs orby using stronger studs at a wider spacing. These significant structural measures increase the wallstiffness and thus can also affect the airborne sound insulation of the wall assemblies. The effectof wall stiffness on airborne sound insulation was investigated, by analysing bendingwavenumbers measured along the primary axis on the gypsum board leaf of a common staggeredstud wood frame wall and of assemblies with smaller than typical stud spacing (i.e. <400 mm),with multi-stud columns at a wider spacing, and with shear membranes in various configurations.A correlation in the change of bending wavenumber results and the change of airborne soundinsulation was found in frequency ranges where the wall stiffness was influenced by the designchanges. The results are promising and a first step towards a method for the estimation ofairborne sound insulation changes from the mechanical properties of the wall.
Publication date
In
  • Proceedings - European Conference on Noise Control (13 September 2012): 208–213.
Series
  • EuroNoise.
LanguageEnglish
Peer reviewedYes
NRC numberNRCC 55222
NRC-IRC-22194
NPARC number20374980
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Record identifier5341210b-4cc2-4760-a954-25a733c65108
Record created2012-07-23
Record modified2020-04-21
Date modified: