| 多孔铝的声学性能 |
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| 引用本文： | 程桂萍 何德坪 等. 多孔铝的声学性能[J]. 东南大学学报(自然科学版), 1998, 28(6): 169-172 |
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| 作者姓名： | 程桂萍 何德坪 等 |
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| 作者单位： | [1]郑州大学，郑州450052 [2]东南大学材料科学与工程系，南京210096 |
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| 摘 要： | 采用负压渗流法制备了多孔铝，利用驻波管法测量了它在空气中声吸收系数，并考查了多孔铝的孔结构对吸声性能的影响，分析了吸声机理，研究了现多孔铝捐声系数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。
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| 关 键 词： | 多孔铝 多孔金属 声学性能 负压渗流 驻波管法 声吸收系数 孔结构 吸声性能 |
Acoustic Property of Porous Aluminum |
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| Cheng Guiping Chen Hongdeng He Deping Shu Guangji Xiao Jinxin. Acoustic Property of Porous Aluminum[J]. Journal of Southeast University(Natural Science Edition), 1998, 28(6): 169-172 |
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| Authors: | Cheng Guiping Chen Hongdeng He Deping Shu Guangji Xiao Jinxin |
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| Affiliation: | Cheng Guiping 1 Chen Hongdeng 1 He Deping 2 Shu Guangji 2 Xiao Jinxin 3 |
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| Abstract: | Porous Aluminum was produced by negative pressure infiltration process. The sound absorption coefficient in air were determined by Standing Wave Tube method. The influence of pore structure of porous aluminum is also studied. It shows that the sound absorption coefficient 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. |
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| Keywords: | porous metals acoustic property negative pressure infiltration |
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