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.
|Title of host publication||Proceedings of the International Congress on Acoustics|
|Publication status||Published - 2001|
|Event||17th International Congress on Acoustics - Rome, Italy|
Duration: 2 Sep 2001 → 7 Sep 2001
Conference number: 17
|Conference||17th International Congress on Acoustics|
|Period||02/09/2001 → 07/09/2001|