摘要
本文根据前文［３］提出的理论，通过数值计算以及实验研究，进一步分析了赝随机扩散体整体结构表面的平均声压与振速，得出了结构表面处的平均声阻抗率，着重分析了非线性耦合声阻率的影响。实验采用二维声学结构，在低频驻波管中测得法向吸声系数，实验结果与理论计算相吻合。这为解释伪随机扩散体的吸声规律提供了有力的依据，并为今后指导工程设计提供了理论基础。
Based on theory proposed on the preceding paper [3], the calculation and experiment of sound absorption by pseudostochastic diffusors are carried out. Average specific acoustic impedance of the whole structure is obtained by calculating sound pressure and particle velocity in the diffllsor plane. The nonlinear coupling specific acoustic resistance is emphatically analyzed. The experiments of measuring normal sound absorption coefficient of the structure in standard wave tube are made. The tested results are agreement with predicted data.
出处
《声学学报》
EI
CSCD
北大核心
1996年第4期620-624,共5页
Acta Acustica
