Simulation and Experimental Investigation on Sound Insulation Performance of Aluminum Foam Composite Structure
Aluminum foam has broad applications in transportation,aerospace and building sound insulation.However,the internal pore size and porosity of single-layer aluminum foam seriously affect the sound insulation effect.In this paper,the sound insulation performance of the two constructed com-posite structures was studied by COMSOL software simulation and impedance tube experimental test, respectively.The results showed that the sound insulation performance of aluminum foam with glass fi-ber sound-absorbing cotton composite structure has been improved in low frequency and medium high frequency.While in the case of aluminum foam with melamine sponge composite structure,its sound in-sulation performance has been greatly improved in whole frequency bands,and the average sound insula-tion has increased by nearly 6.8dB.