Sound absorption properties of automotive ornamental materials

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.