研究了泡沫Ａｌ７Ｓｉ０．４５Ｍｇ合金的压缩性能、吸能率，压缩后试样在空气中的流通能力，测试了其吸声和隔声性能，讨论了试样原始孔隙率对上述性能的影响，以及它们之间的相互关系． The compressive property, energy absorption rate, flowability of the compressed sample in the air after foamed Al7Si0.45Mg alloy were studied. The sound absorption and sound insulation properties of the alloy were tested. The influence of the original porosity of the sample on the above properties Influence, and the interrelationships between them.