Associate Professor, Faculty of textile science and technology, Shinshu University, Japan.

Speech Title: Theoretical analysis of sound insulation performance through multi-layered structures
Abstract: Based on the continuum mechanics, a theoretical model is proposed to simulation and analyze the sound insulation through multi-layered panels. In the study, the influences of parameters of multi-layered structures, such as the panel thickness, the air medium between plates and the air space, on the sound transmission loss are investigated and discussed based on the proposed method. The result shows that the sound transmission loss through multi-layered panels can be improved by separated air space thickness or decreasing air pressure due to a change in wave resonance frequencies of mass-air-mass.