Effect of structural parameters on the sound absorption properties of warp-knitted spacer fabrics

In this study, a series of warp-knitted spacer fabrics conducted of different structural parameters including the inclination degree of spacer yarn, thickness, surface layer structure and diameter of spacer yarn, have been successfully manufactured in order to investigate the relationship between sound absorption properties and structural parameters of warp-knitted spacer fabrics. The spacer fabrics were characterized for sound absorption behaviors by using an impedance tube. The findings obtained indicate that the structural parameters have significant influence on the sound absorption performance of spacer fabrics. The fabric made with smaller inclination degree of spacer yarn has superior sound absorption abilities as compared to the corresponding fabric. In contrast, the fabrics produced by higher thickness and coarser spacer yarn exhibit preferable sound absorption performance. Furthermore, the fabric conducted of closer surface layer possesses better sound absorbability. All the results could offer valuable guidance on the selection, of structural parameters and properties study of warp-knitted spacer fabrics.