Airborne Sound Insulation of a Thin Plate of Finite Dimensions
2005 (English)In: Acta Acoustica united with Acustica, ISSN 1610-1928, Vol. 91, no 4, 732-739 p.Article in journal (Refereed) Published
An analytical model for predicting the sound reduction index of a single plate is presented. The plate is assumed to be excited by a diffuse sound field and the velocity distribution of the plate is derived from the Kirchoff plate equation in the frequency domain. The resulting Fourier transform is evaluated using residue calculus and the solution is verified numerically. The analytical model is valid for a wide frequency range, both below, above and at the critical frequency. Special interest is paid to the area dependency of the sound reduction index. Calculated results are presented for a 0.5 m(2), 1.7 m(2) and 4.4 m(2) plate of 16 rum chipboard. These results, which agree well with measured values, show that the sound reduction index decreases with increasing area in the whole frequency range.
Place, publisher, year, edition, pages
2005. Vol. 91, no 4, 732-739 p.
acoustic insulation, panel walls, single, transmission, radiation
IdentifiersURN: urn:nbn:se:kth:diva-5076ISI: 000230803000014ScopusID: 2-s2.0-23044495946OAI: oai:DiVA.org:kth-5076DiVA: diva2:7826
Uppdaterad från "submitted" till published: 20101101.
QC 201011012005-04-272005-04-272010-11-01Bibliographically approved