论文部分内容阅读
In the reverberation chamber and the anechoic chamber,the sound transmission loss(STL)of panel specimens and steel sheets is measured.According to the insulation theory of combination parts,A program named IAS which can be used to calculate the STL of the vehicle inner dash system is compiled with the MATLAB.The calculated results show good correlation with the STL measurements of the inner dash system.In this paper,the key parameters which can effect the STL of the inner dash system are analyzed and the insulation optimization of the inner dash system is conducted and applied based on the calculation of the IAS program.