汽车内饰材料的吸声性能

Sound absorption properties of automotive ornamental materials

分析了针刺非织造汽车内饰黄麻毡的面密度与吸声性能的关系,并在黄麻纤维中混入一定量的铝纤维,分析铝纤维的混入质量、混合方式对其吸声性能的影响。结果表明:在同一测试声波频率下,黄麻毯的吸声性能随着面密度的增加而提高,在面密度为764 g/m2时吸声性能最好;铝纤维的加入有利于吸声性能的提高,吸声性能随着铝纤维含量的增加而提高,进口铝纤维的吸声性能优于国产铝纤维;此外,麻、铝纤维的混合方式也对吸声性能有影响,当铝纤维网铺放在黄麻毯的反面时吸声最好,正面次之,中间和混合最差。

In this paper,the relationship between surface density and sound absorption performance of the automobile interior trim jute carpet processing by nonwoven acupuncture was analyzed.Then the jute fiber with a certain content of aluminum fibers at different weight or mode was mixed and the factors affecting the acoustlc performance were analyzed.The results showed that at the same test sound wave frequency,the sound absorption properties of jute carpet samples improve with the increase of surface density and the best density is 764 g/m2.Aluminum fiber is helpful to improve the acoustic performance and sound absorption properties of aluminum fibers increasing with the ratio of fiber.Imported aluminum-made fiber acoustic performance is better than aluminum fiber.In addition,the sound absorption properties are different with mixed mode.When the aluminum fiber mesh on the opposite of the jute carpeter,sound absorption coefficient is the best,followed by positive,intermediate and mixed is the worst.