A model of multi-layer metal foam sound absorption structure

Multi-layer metal foam sound absorption structure theory model based on transfer function model is proposed in this paper on the strength of the equivalent fluid model. The model can be used to predict the sound absorption effect of composite structure for sound absorbing and guide the design of the structure parameters. The accuracy of the model is verified by comparing the calculated results obtained from the model with the experimental data. The best sound absorption properties can be obtained by adjusting the multi-layer structure parameters of foam metal.