Abstract:

The prediction tools of acoustic property have been applied to the investigation of the effect of sound package on acoustic cavity damping. This paper proposes a transfer matrix-based method to predict the acoustic property of multi-layered anti-noise material. In the proposed method , the non-uniformities of the insulation part and the structure are both considered , and the quantity of multi-layered insulation components can be calculated outside the statistical energy analysis (SEA) program. The application of the proposed method to the transmission loss prediction of correction components shows that the predicted results accord well with the measured ones.

Key words: anti-noise material, statistical energy analysis, transmission loss, parameter prediction, multi-layered trim, coupling loss factor