空气中及水下单层结构的隔声相似性研究与实验验证

Sound insulation of single-layered structures in air and under water with experimental verification

摘要: 文章以波动声学理论和传递矩阵法为基础,分别建立了声波垂直入射时空气中与水下单层隔声结构的理论分析模型,并就上述两种结构分别在空气中和水下对其隔声性能的相似性进行了数值仿真与对比分析;最后,以6mm厚的钢板为样品,对它们的隔声相似特性进行了实验验证。利用这种相似性,可以通过对空气中结构的隔声降噪趋势来估计水下该结构的隔声降噪趋势,对水下隔声理论起到一定的指导作用。

Abstract: Based on the acoustic wave theory and using transfer matrices,we propose a theoretical model of sound insulation of single-layered structures with perpendicular incidence both in the air and under water.Numerical simulation and comparative analysis are carried out.Using an armor plate as a sample,similarity of sound insulation characteristics in the air and under water is experimentally verified.This study provides a comparison between the trends of single-layered sound insulation in the air and under water.