Cross laminated timber (CLT) as building material has rapidly gained in popularity in recent years, and thereby also the demand of engineering tools to predict the sound insulation through CLT walls. The sound reduction through walls of single and double panels is predicted and the results are compared with those found in the literature as well as with a series of measurements conducted in a test mock-up of two rooms. Various configurations are considered where the plate thickness, addition of plaster boards and cavity distance (in case of a double panel) are altered. The prediction of single panel walls is based upon an established model (by Sharp) for homogenous materials, based upon theory and empirical data. For optimized application to CLT constructions specifically, the model is modified to some extent. The double panel walls are analytically modelled under the presumptions of no mechanical connection between the two panels and a cavity filled with mineral wool. The model make use of the results from the developed model for individual panels. The accuracy of the predicted sound insulation is estimated to be within a couple of dB’s concerning the weighted sound reduction indexes from 100 and 50 Hz.
ISBN för värdpublikation: 978-3-939296-15-7