中文摘要：

本文根据多孔材料的吸声原理,重点介绍了无机类多孔吸声材料的研究现状。针对目前研究中存在的防水性能差,低频吸声系数低等问题进行了分析,并提出了相应的解决方案。介绍了孔隙率、密度、材料厚度等因素对材料吸声性能的影响,并展望了吸声材料的未来发展方向。

英文摘要：

Based on the principle of sound absorption of porous materials, the research status of various kinds of porous sound absorbing materials is introduced. The solutions are proposed by analyzing the problems of the poor waterproof performance and low frequency sound absorption coefficient. The effects of porosity, den- sity and material thickness on the sound absorption properties of the materials are introduced. A prospect for the development of the sound absorption materials are made.