Journal of Vibration and Sound

Journal of Vibration and Sound

Sound Absorption of Warp Knitted Spacer Fabric based on the thickness

Document Type : research article

Authors
1 Amirkabir University
2 amirkabir university
3 University of Guilan
Abstract
Along with the expansion of industries and the creation of unwanted sounds, acoustic phenomena and sound control has been the subject of many researches and so far different materials have been used to control it. In this work, samples of polyester yarns were produced by Rachel knitting machine equipped with two needle bars and six guide bars. The two sides of the all samples were similar with a texture of a simple knit on one side and a perforated knit structure on the other side. thickness of samples between the two sides due to various knit structures of samples was considered as the main difference between the samples. Acoustic absorption coefficient of the samples was measured by using impedance tube method in different frequencies by arranging the samples in one and three layers. It was found that the sound absorption coefficient of samples increases by increasing the thickness of samples
Keywords
Subjects

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