Fractal Approach to Sound Absorption Behavior in Cashmere Fiber Assembly
Sound absorption property in fiber assembly requires specifying relationship with structural characteristic. Fractal approach seems to be a potentially useful tool to describe hierarchical systems and is suitable to link the structure and acoustic properties of fiber assembly. In this paper, we show a new method to detect the inner microstructure of cashmere fiber assembly, which is micro-CT scanner. Furthermore, the pore area fractal dimension of fiber assembly is calculated, using 2D images of the inner cross-section. And the sound absorbing behavior of assembly is measured. Correlation between the fractal dimension of fiber assembly and its structural characteristics and the acoustic absorption property is also studied. The results indicate that the pore area fractal dimension is negative correlated with porosity of assembly, and the maximum acoustic absorption coefficient grows linearly with increasing pore area fractal dimension, while the critical frequency moves towards lower frequency.
cashmere fiber assembly micro-CT scanner pore area fractal dimension acoustic absorption coefficient critical frequency
YANG Shu YU Weidong PAN Ning
College of Textiles & Center of Soft Materials, Donghua University, Shanghai, China College of Textiles & Center of Soft Materials, Donghua University, Shanghai, China College of Texti College of Textiles & Center of Soft Materials, Donghua University, Shanghai, China Biological and A
国际会议
The 12th International Wool Research Conference(第十二届国际羊毛会议12th IWRC)
上海
英文
827-831
2010-10-19（万方平台首次上网日期，不代表论文的发表时间）