高效纤维-石膏功能复合吸声材料的研制

Developments of efficient sound absorption of fiber-gypsum functional composite materials

以高强石膏为胶凝材料,内掺玻璃纤维,制备出一种新型多孔吸声材料。实验发现,孔隙率、平均孔径大小、玻璃纤维含量、发气剂含量对材料吸声性能有显著影响。采用驻波管法测试材料的吸声系数。结果表明材料的平均吸声系数和降噪系数分别达0.58和0.60,且材料的中低频吸声性能优良。

A new type of porous sound absorbing material was made from super-strength gypsum and glass fiber. Effects of the content of fiber,vesicant,pore ratio and pore diameter were investigated,the results indicates the variables have great effects on the sound absorbing performance of the samples. The sound absorption coefficient of the material was tested by standing wave tube method. The result shows that average absorption coefficient and noise reduction coefficient separately equal to 0.58 and 0. 60,and fine property of sound absorption at middle-low frequency.