Absorption Coefficient of Tricot Warp Knitting Fabrics as Acoustic Textile Materials

Abstract

Acoustic textiles generally use materials from natural or artificial fibers made by nonwoven or composite processes as sound absorption. The material has less aesthetic appearance, so it needs to be layered again with woven or knitted fabrics. This study, using 3 types 4-layered tricot warp knit fabrics with the characteristics related to thickness, density and porosity as the parameters for sound absorption material, aims to achieve a predetermined absorption coefficient value and have good aesthetics than nonwoven. The sound absorption test uses the impedance tube method at frequencies of 63 Hz to 6000 Hz with Retrieving data at a standard frequency of 100 Hz and a high frequency of 6000 Hz. The result shows that the structure of tricot with the highest density is the best fabric for sound absorption for it has the highest sound coefficient value.