Airborne Sound Insulation of Floating Floors
2001 (English)In: Acustica, ISSN 0001-7884, Vol. 87, no 2, 215-225 p.Article in journal (Refereed) Published
An analytical model is presented for the sound reduction index of finite size floating floors. The model consists of two elastic plates with a resilient layer in between. The bottom plate, the load-bearing slab, is assumed to be excited with a diffuse airborne sound field. The top plate and the resilient layer compose the floating floor. The problem is solved for frequencies below, between and above the critical frequencies of l:he plates. Above the critical frequency of the load-bearing plate, but below that of the floating slab, the main coupling between the plates will occur at the coincidence angle of the load-bearing plate. Above the critical frequency of both plates, transmission will occur at the angle of coincidence of each plate. As the plates will interact, the sound insulation improvement will to some extent depend on the properties of the load-bearing slab. In the article it is shown how the sound reduction index depends on the physical parameters and the geometry of the plates.
Place, publisher, year, edition, pages
2001. Vol. 87, no 2, 215-225 p.
IdentifiersURN: urn:nbn:se:kth:diva-5078ISI: 000169170700008OAI: oai:DiVA.org:kth-5078DiVA: diva2:7828
QC 201011012005-04-272005-04-272010-11-01Bibliographically approved