多孔吸声材料静流阻率的非线性估计  

Nonlinear Estimation of Static Flow Resistivity of Porous Sound Absorbing Materials

作　　者：彭锋[1,2] 常宝军[1,2] 孙艳[3] 

机构地区：[1]中国科学院噪声与振动重点实验室(声学研究所),北京100190 [2]中国科学研究院声学研究所声场声信息国家重点实验室,北京100190 [3]北京工业大学建筑与城市规划学院,北京100124

出　　处：《北京工业大学学报》2012年第11期1756-1760,共5页Journal of Beijing University of Technology

基　　金：国家'973'计划资助项目(2011CB610302);国家自然科学基金资助项目(10774157)

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.Nonlinear absorbing material, estimation method was applied to obtain the characteristic parameters of porous 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 resutts agree well with the direct measurement results, so the method is validated.

关 键 词：多孔吸声材料 特征参数 静流阻率 非线性估计 

分 类 号：O429[理学—声学]