Abstract
Structure-borne sound attenuation of lightweight timber floor structures has been investigated by high-resolution numerical calculation methods. Two models have been studied both experimentally and numerically. The first considers a continuous chipboard plate and a supporting beam. The second considers two plates that are fastened on one beam. Damping effects, which arise from the two different discontinuities, are included. The real-valued modulus of elasticity is replaced with a complex value. In the calculations, the orthotropic material characteristics of the building material have also been taken into account. The results from the calculations and laboratory measurement confirm that the attenuation rate is highly dependent on the excitation location, if all the other parameters remain the same.
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