摘要
利用驻波管法测量了不同孔结构的多孔铝在声波频率为１２５＿ ４０００Ｈｚ时的空气声吸收系数。结果表明，它与多孔铝的孔结构有密切关系，即随孔径的减小和试样厚度的增加而增大，当孔隙率达到某一临界值时可获得最佳吸声效果。
The sound absorption coefficient in air of porous aluminum was determined by Standing Wave Tube method. The results show that the sound absorption coefficient has close relation with the pore structure, it increases with the decrease of pore diameter and the increase of sample’s thickness. It is found that the best sound absorption can be obtained at a critical porosity.
出处
《机械工程材料》
CAS
CSCD
北大核心
1999年第5期30-31,41,共3页
Materials For Mechanical Engineering
基金
国家自然科学基金!(19472020)
