芳纶毡体/阻尼弹性薄膜复合材料的吸声隔声性能

Sound Absorption and Sound Insulation Properties of Aramid Felt/Damping Elastic Film Composite

制备了非织造芳纶毡体、阻尼弹性薄膜及双层、三层结构的非织造芳纶毡体/阻尼弹性薄膜复合材料;利用驻波管测试方法研究了非织造芳纶毡体厚度及不同复合结构对复合材料吸声性能的影响;利用混响室-消声室法研究了各试样的隔声性能。结果表明:三层复合材料的吸声隔声性能优于两层复合材料的;对于厚度相同的三层复合材料,表层材料应选择吸声性能较好的材料。

Nonwoven aramid felt, damping elastic films, and double, three layer compound structure nonwoven aramid felt/damping elastic film composite materials were prepared. Standing wave tube test method was used to investigate the influence of sound absorption coefficient in different thickness of aramid fdt and different compound structures of the composite. Aramid felt and damping elastic film were placed in reverberation and anechoic room to test the sound-insulation capabilities. The results showed that the sound absorption and sound insulation properties of the three-layer eomposite material was superior to a composite of two layers; for the same thickness of three layer compound materials, good sound-absorption property of the surface layer material should be selected.