Research on sound absorption performance and optimal design of acoustic materials containing cavity structure

Based on the finite element method, this paper first discusses the sound absorption characteristics of acoustic materials with a cavity structure backed by air, and then takes the internal cavity of the acoustic material and the acoustic material as the research object, considering the sound waves of different frequencies and different incident angles. The maximum sound absorption coefficient is used as the objective function to optimize the design of the cavity acoustic material. The calculation results show that the sound absorption performance of the optimized acoustic material has been significantly improved.