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Prediction model for the impact sound pressure level of decoupled lightweight floors
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Operation, Maintenance and Acoustics.
2009 (English)In: 38th International Congress and Exposition on Noise Control Engineering 2009: INTER-NOISE 2009 ; Ottawa, Canada, 23 - 26 August 2009 / [ed] J. Stuart Bolton, Red Hook, NY: Curran Associates, Inc., 2009, 2038-2046 p.Conference paper (Refereed)
Abstract [en]

Prediction of impact sound insulation in timber buildings is difficult since the constructions are complex, non isotropic and show large variances. There are earlier publications on precise models of simplified structures and simplified models of complex structures, where so far, none is considered as an acceptable simplified engineering model tool. The goal of our research is to develop methodology for such a simplified engineering tool. The starting focus is to model impact sound in a simple floor model of two plates that are realistically coupled via beams. The floor structure in Nordic countries is mostly decoupled, meaning there is either no structural connection or an elastic connection between the plates and the beams. In this paper, an improved floor model is proposed where as a first step there is no physical connection between the plates and beams, and where each plate is stiffened by separate beams. Hence the construction becomes more realistic as only coupling between the plates via air trapped inside the cavity is taken into account. Next step will be to introduce resilient coupling between the respective beams. The modelling show promising results with reasonable sound insulation improvements.

Place, publisher, year, edition, pages
Red Hook, NY: Curran Associates, Inc., 2009. 2038-2046 p.
Research subject
Engineering Acoustics
URN: urn:nbn:se:ltu:diva-30851Local ID: 4d520120-bd65-11de-b769-000ea68e967bISBN: 978-1-615-67690-3OAI: diva2:1004080
International Congress and Exposition on Noise Control Engineering : 23/08/2009 - 26/08/2009
Godkänd; 2009; 20091020 (ysko)Available from: 2016-09-30 Created: 2016-09-30Bibliographically approved

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Mosharrof, Mohammad SazzadLjunggren, FredrikÅgren, Anders
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