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研究了泡沫A1的声频内耗结果表明：泡沫A1的内耗值比普通A1大一个量级以上，且随测量频率的增加而减小，出现了正常振幅效应用平面波动方程~[1.2]，推导了泡沫A1的内耗与频率、孔隙率和孔径的关系，较好地解释了实验结果．
The results of the research on the internal friction of foam A1 show that the internal friction of foam A1 is more than one order of magnitude larger than that of normal A1 and decreases with the increase of the measuring frequency. The normal amplitude effect appears with the plane wave equation [1.2] The relation between the internal friction and the frequency, porosity and pore size of the foam A1 is a good explanation of the experimental results.