【摘要】 对多孔铝的空气声吸收性能进行了研究。结果表明:多孔铝具有较高的空气声吸收系数,并且与孔结构密切相关。声吸收系数在低频端(<1 kHz)较低,高频端(>1 kHz)则可达到0.85以上。随着孔隙率、孔径的减小,多孔铝的共振吸声系数有所下降,吸声频谱曲线向低频方向移动,且频带宽度展宽。更多还原

【Abstract】 The air sound absorption property of porous aluminum was studied.The sound absorption coefficient was smaller in low frequency (<1kHz) than that in high frequency(>1kHz).In high frequency,the sound absorption coefficient could reach 0.85 and decreased when the porosity and pore diameter decreased.When the porosity and pore diameter reduced,the sound absorption curve moved to the low frequency zone and the frequency bandwidth increased at the same time.更多还原