Investigation of Non-acoustical Parameters of Fiber Assemblies
Textiles have been used as acoustic absorbing materials in many fields including vehicles and buildings. Many researchers have done studies on the acoustic behaviors of fibrous materials. However, very few if any studies have been reported to investigate the connection between the acoustic behaviors of a general fibrous material to its more fundamental physical properties such as the bulk density or the porosity. In this paper, we set out to examine the relationship between the measured acoustic absorption parameters of fiber assemblies and such parameters as the average bulk density, fiber shape and air gap between fibers. Four types of fiber assemblies are studied using the standing wave tube method to explore the effect of several parameters on their acoustic absorption properties. The parameters include the average bulk density of assemblies, density and structure of fiber and the effect of air gap. The results show that as the average bulk density increasing, the peak of the absorption spectra will shift towards lower frequency. And the air gap between fibers can increase the absorption capacity especially in the low and medium frequency range.
fiber assemblies acoustic absorption porous structure peak shift
YANG Shu YU Wei-dong PAN Ning
College of Textiles & Center of Soft Materials, Donghua University, Shaghai, China College of Textiles & Center of Soft Materials, Donghua University, Shaghai, China Biological and Ag
国际会议
2010 International Forum on Biomedical Textile Materials(2010国际纺织生物医用论坛)
上海
英文
322-327
2010-05-28（万方平台首次上网日期，不代表论文的发表时间）