Experimental Research on the Normal Absorption Coefficient of the Multilayer Material

摘要：

The normal absorption coefficient of the multilayer material was studied in this research. A measurement duct system was established at first, and then the absorption coefficients of multilayer material with different structures were measured through this experimental system. Some conclusions could be drawn: Compared with the uniform material, the multiple layer material can change the absorption coefficient significantly without increasing the thickness of the material in low frequency band. The position and the area density of the aluminum plate can both change the absorption coefficient significantly. The frequency corresponding to the absorbing peak value decreases with the increasing of the area density of aluminum plate. The absorption coefficient becomes larger near to one in low frequency band and in the meantime changes lower than 0.1 in the high frequency band. The position and area density of the aluminum plate can be designed to satisfy the requirements of the sound absorption.

关键词： normal absorption coefficient multilayer material measurement research

作者: Tao Feng Bin Liu Jing Wang Xue Wu Nan Li

作者单位: School of Mechanical Engineering, Beijing Technology and Business University, Beijing, 100048,China

会议类型: 国际会议

会议名称: 2011 International Conference on Advanced Material Research(ICAMR 2011)(2011年先进材料研究国际会议)

会议地点: 重庆

会议语种:英文

页码: 608-612

在线出版日期: 2011-01-21（万方平台首次上网日期，不代表论文的发表时间）