参量阵扬声器的反射特性研究

针对参量阵非线性自解调可听声的高指向性特性,建立反射区域声场模型,对刚性反射情况下的声场进行了仿真,并与实验结果进行了对比.在此基础上,使用单频声信号,在自由空间内对吸声材料反射表面的驻波声场进行测量,通过驻波比方法计算材料的吸声系数,并与传统驻波管测量结果进行了对比.结果表明,在不使用驻波管的情况下,可以通过使用参量...

Investigation on the Reflection Property of Parametric Array

Based on the high directional property of the self-demodulated sound from parametric array,the reflected sound fields are modeled,and compared to the experimental results.According to the plan wave property of the self-demodulated sound in the near field,the absorption coefficients of the material are deduced from the stand wave ratio in front of the materials in free field under the excitation of single frequency sound waves.The testing results are compared to the standing wave tube method,which show good ...