Measurements of junction vibration level differences of timber framed constructions

摘要

Flanking transmission of supporting walls of timber framed constructions limits the sound insulation properties in multi storey buildings. Both transmission from the floor construction to the supporting walls and the transmission from wall to wall and to either floor or ceiling through the junction is a part of this challenge. This article presents a method of how to measure the vibration transmission properties well fitted for in-situ measurements. The method is applied on some common Norwegian solutions and results will be presented and compared with similar results from other investigations. There is also a lot of research going on to improve the calculation of sound insulation in lightweight constructions according to EN-ISO 12354. Beside the method itself it includes studies on necessary input data regarding the vibration index, K_(ij) and vibration level difference. The article will give some contribution regarding the distribution of the vibration level from the in-situ measurements.