A computational model for the sound absorption coefficients of multi-layer non-wovens

作者：Liu, Xinjin^*; Liu, Jianli; Su, Xuzhong

来源：Textile Research Journal, 2015, 85(15): 1553-1564.

DOI：10.1177/0040517512474368

• multi-layer non-wovens
• computational model
• absorption coefficient

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, (n), is presented in this paper. The iterative algorithm for calculating (n) 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.

• 出版日期2015-9
• 单位江南大学