Sound absorption characteristics of porous aluminum fabricated by spacer method
Sound absorption characteristics of porous aluminum fabricated by spacer method
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DOI：
10.1063/1.2390543
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发表时间：
2006-12-01
影响因子：
3.2
通讯作者：
Mabuchi, Mamoru
中科院分区：
文献类型：
--
作者：
Hakamada, Masataka;Kuromura, Tetsunume;Mabuchi, Mamoru
采用间隔法制备了孔隙率为85%-95%、孔径为212-300~610-700 μm的多孔铝试件，并采用传递函数法研究了其吸声系数。吸声系数随着孔隙率的增加而增加。然而，孔径和吸声系数之间没有明显的相关性。此外，吸声系数取决于厚度。即使孔隙率和孔径不变，通过孔径尺寸的修改，试件的吸声系数也得到显着提高。因此，表明通过垫片法制造的多孔铝的吸声行为不仅受到孔隙率和孔径的影响，而且还受到孔径尺寸的影响。 (c) 2006 年美国物理研究所。
Porous Al specimens with porosities of 85%-95% and pore sizes of 212-300 to 610-700 mu m were fabricated by the spacer method, and their sound absorption coefficients were investigated by the transfer function method. The sound absorption coefficient increased with porosity. However, there was no apparent correlation between pore size and sound absorption coefficient. Also, the sound absorption coefficient depended on the thickness. The sound absorption coefficient of a specimen was significantly improved by the modification of aperture size, even if the porosity and pore size were unchanged. Therefore, it is suggested that sound absorption behavior is strongly affected by not only the porosity and pore size but also the aperture size for porous Al fabricated by the spacer method. (c) 2006 American Institute of Physics.