Sound absorption property of open-pore aluminum foams  

作　　者：WANG Fang WANG Lu-cai WU Jian-guo YOU Xiao-hong 

机构地区：[1]Department of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, Shanxi, P. R.China

出　　处：《China Foundry》2007年第1期31-33,共3页中国铸造（英文版）

摘　　要：This paper presents a study on sound absorption property of aluminum foam by evaluating its sound absorption coefficients using standing wave tube method. Experimental results showed that the average values of sound absorption coefficients (over the test frequency range) are all above 0.4, which indicate very good sound absorption property of the aluminum foams. The sound absorption coefficient is affected by frequency and pore structure, and reaches its maximum value at around 1 000 Hz. With the increase of porosity and decrease of cell diameter, the sound absorption coefficient values increase.This paper presents a study on sound absorption property of aluminum foam by evaluating its sound absorption coefficients using standing wave tube method. Experimental results showed that the average values of sound absorption coefficients （over the test frequency range） are all above 0.4, which indicate very good sound absorption property of the aluminum foams. The sound absorption coefficient is affected by frequency and pore structure, and reaches its maximum value at around 1 000 Hz. With the increase of porosity and decrease of cell diameter, the sound absorption coefficient values increase.

关 键 词：aluminum foam sound absorption property sound absorption coefficients plane-wave impedance tube 

分 类 号：TB34[一般工业技术—材料科学与工程] TU552[建筑科学—建筑技术科学]