(东北大学 材料与冶金学院，沈阳 110089)
摘 要: 将不同打孔率、厚度、打孔方式的闭孔泡沫铝板与玻璃棉进行组合，使用驻波管吸声测试仪进行吸声系数测试，研究组合形式对闭孔泡沫铝板吸声效果的影响。结果表明，通过对吸声峰值、降噪系数、半峰宽值的计算和比较可以看出，吸声峰值在低频的试样在前、峰值在高频的试样在后的组合形式有利于吸声，出现两个吸声峰，降噪系数和半峰宽值也都大大提高；打孔闭孔泡沫铝板与玻璃棉的组合使峰值略有提高，但性能总体的改变不大，而玻璃棉本身易造成环境污染，因此，该种组合不适于在吸声领域应用。
关键字: 吸声系数；泡沫铝；玻璃棉；打孔；吸声结构
closed-cell aluminum foam perforated
（School of Materials and Metallurgy, Northeastern University, Shenyang 110089, China）
Abstract:The closed-cell aluminum foams with various specimen thicknesses, perforation ways and perforation rates were grouped with glass wool. The sound absorption coefficient was measured by standing-wave method, and the effect of combining form on the sound adsorption of closed-cell aluminum foam perforated was studied. The results show that, being evaluated by the maximum of sound absorption coefficient, noise reduction coefficient and half-peak breadth, the specimens with the maximum of sound absorption coefficient at low frequency should be put before the specimens with the maximum of sound absorption coefficient at high frequency, which shows two peaks of sound adsorption, and greatly increases the noise reduction coefficient and half-peak breadth. The maximum of sound absorption coefficient increases slightly in a combination of closed-cell aluminum foam perforated and glass wool. However, the glass wool is apt to cause environmental pollution. Thus, the combination is unsuitable for sound absorption.
Key words: sound absorption coefficient; aluminum foam; glass wool; perforation; sound absorption structure
