【摘要】 为得到多孔吸声材料的声学特征参数,提出采用非线性估计方法进行提取,并进行了相应的对比实验,通过对高孔隙率多孔金属纤维样本的声学测试,采用样本吸声系数的实测结果作为响应函数,估计的静流阻率参数与该参数的直接测试结果对比基本吻合,验证了所提方法的有效性.更多还原

【Abstract】 Nonlinear estimation method was applied to obtain the characteristic parameters of porous absorbing material,and experimental comparison was performed to validate the method.In the experiment,sound absorption coefficient of some highly porous metallic fibrous samples was measured and considered as responding function to estimate the static flow resistivity.Estimation results agree well with the direct measurement results,so the method is validated.更多还原