目前吸声材料大多为疏松多孔的材料，如矿渣棉、毯子等，其吸声机理是声波深入材料的孔隙，且孔隙多为内部互相贯通的开口孔，受到空气分子摩擦和粘滞阻力，以及使细小纤维作机械振动，从而使声能转变为热能。这类多孔性吸声材料的吸声系数，一般从低频到高频逐渐增大，故对高频和中频的声音吸收效果较好。我司生产的泡沫陶瓷过滤片同样可以应用在此领域，效果显著，同时具有防火、防水、防腐蚀、环保、使用时间长等优点。

Currently most sound-absorbing materials are porous, like slag wool, blanket, which have good performances in high frequency and medium frequency sounds due to air viscosity of internal porous structure. Filtec’s Ceramic foam filter can be also used in this field and have a positive effect due to the excellent property of fireproof, waterproof, anti-corrosion, environmental protection, long lifetime.