On the air-gap between narrow plates

Sven G. Lindblad, Jonas Brunskog

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


It has been reported in experimental investigations that the air-gap between gypsum plates can have an influence on the sound transmission of lightweight walls. This small influence can be explained as a resonance. In theoretical literature one can find the influence on the energy dissipation of a narrow air layer behind a plate, but not on the transmission. The aim of this paper is to describe the influence of a thin air layer on the sound transmission. The paper investigates this phenomenon by means of a simple theory and gives a historical background to the theory. The narrow air layer is described by means of wave motion in the plane of the plates, i.e. not as a locally reacting spring. Viscous effects are included by means of a parabolic displacement assumption.
Original languageEnglish
Title of host publicationProceedings of the International Congress on Acoustics
Publication date2001
Publication statusPublished - 2001
Externally publishedYes
Event17th International Congress on Acoustics - Rome, Italy
Duration: 2 Sept 20017 Sept 2001
Conference number: 17


Conference17th International Congress on Acoustics


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