Flanking transmission of continuous ground plates

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Abstract

The ground plate, consisting of a concrete plate resiliently separated to the ground by an elastic layer of mineral wool or polystyrene foam plastics, is a common building detail in dwellings, at least in Scandinavia. The separating wall is typically a lightweight construction with high transmission loss. The common acoustical recommendation to the constructors is either to totally separate the ground plate under the separating wall, or to increase the vibration transmission loss by means of extra plate thickness under the separating wall. However, the first recommendation is not always possible for reasons of statics, the second has practical drawbacks in terms of extra costs and long drying times. A solution, studied herein, is to have a continuos plate under the separating wall, and instead increase the thickness of the entire plate. The aim of the paper is to present a prediction model for flanking transmission of continuous ground plates. Hence, the question is what thickness is necessary to yield a reasonable total transmission loss. The model is analytic, using a modal approach. The result is presented in terms of weighted insertion loss as a function of design parameters.
Original languageEnglish
Title of host publicationInter-Noise 2002
Publication date2002
Publication statusPublished - 2002
Externally publishedYes
Event2002 International Congress and Exposition on Noise Control Engineering - Dearborn, MI, United States
Duration: 19 Aug 200221 Aug 2002

Conference

Conference2002 International Congress and Exposition on Noise Control Engineering
CountryUnited States
CityDearborn, MI
Period19/08/200221/08/2002

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