Prediction of the sound insulation of panel structures based on the virtual testing room

摘要

The sound transmission through an elastically bounded panel between rooms is presented in this paper.A fully-coupled modal is used to investigate the effect of elastic boundary of the panel on the sound transmission by using Spectro-Geometric Method(SGM)which is a meshless and parametric modeling technique for general vibro-acoustic analysis.Unlike the traditional modal superposition methods,the continuity of the normal velocities is faithfully enforced on the interfaces between the flexible panel and the(interior and exterior)acoustic media.The sound insulation structures can represent a simple panel or a complex structure with various structural and/or acoustical design features.This model can be effectively used to virtually test the acoustic performance of sound insulation designs under different environments and application conditions.