Structure-borne sound propagation across a double leaf timber-frame wall

  • With the increasing mechanization of buildings, it is necessary to be able to predict both the structure-borne sound power input from building machinery and the subsequent propagation of structure-borne sound in the building. This paper considers lightweight constructions and describes the results of an experimental study in the laboratory on a T-junction that was constructed from a timber joist floor and two double leaf timber-frame walls. The focus in this paper is on the vibrational behaviour of one of the timber-frame walls. To assess the vibration pattern and the propagation of structure-borne sound, the surface velocity levels were measured on a grid on both leaves of the wall with point force excitation on one side. This grid allowed calculation of structural intensity vectors. The influence of elements such as the timber studs and tongue and grooved joints between the boards were apparent in different frequency regions. Experimental modal analysis was carried out using measurements on both leaves of the wall, giving information about the coupling in different frequency regions. The results give insight into how such a timber-frame wall could be modelled using statistical energy analysis.

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Author:Fabian Schöpfer, Carl Hopkins, Andreas R. Mayr, Ulrich Schanda
Parent Title (English):22nd International Congress on Sound and Vibration, ICSV22, Florence, Italy, July 2015.
Document Type:Conference Proceeding
Publication Year:2015
Tag:Double-leaf timber-frame wall; Structure-borne sound propagation
faculties / departments:Fakultät für Angewandte Natur- und Geisteswissenschaften
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik