A computational model for the sound absorption coefficients of multi-layer non-wovens. Issue 15 (September 2015)

• Record Type: Journal Article
• Authors: Liu, Xinjin; Liu, Jianli; Su, Xuzhong
• Is Part Of: Textile research journal. Volume 85:Issue 15(2015)
• Page Start: 1553
• Page End: 1564
• Publication Date: 2015-09
• Subjects: multi-layer non-wovens -- computational model -- absorption coefficient; Textile industry -- Periodicals; Textile fabrics -- Periodicals; Textile research -- Periodicals; Textiles et tissus -- Industrie et commerce -- Périodiques; Textiles et tissus -- Périodiques; Textiles et tissus -- Recherche -- Périodiques; Electronic journals; 677.005
• DOI: 10.1177/0040517512474368
• Languages: English
• ISSNs: 0040-5175

Abstract

Using the theory of Zwikker and Kosten for sound propagation through a porous flexible media and the sound propagation boundary conditions at adjacent interfaces, a general computational model for the sound absorption coefficients of multi-layer non-wovens, αn, is presented in this paper. The iterative algorithm for calculating αn is given using the back-stepping method. In order to yield the highest sound absorption coefficients in the audible frequency range the model has been used for numerical calculation of the intrinsic characteristics of non-woven materials. The simulation demonstrates that the multi-layer structure of non-wovens can have good sound absorption over a prescribed frequency range by choosing the appropriate parameters for each layer. This model can also be used to calculate the absorption coefficients of a multi-layer non-woven comprising different non-woven components, and this can then provide a theoretical support for product design.