The vibration sound absorption theory for thin fiber layers
Nowadays, we still use the Rayleigh model to explain the sound absorption principle for fibrous material. Based on Rayleigh model, Zwikker and Kosten established the theory of effective density and the effective bulk modulus 50 years ago. Although the theory has been studied for over 100 years, both the Rayleigh model and Zwikker and Kosten theory can not get the exact results to agree with the practice. A new theory which applied membrane vibration theory for the thin fibrous material was put forward that fibrous material absorbs the sound by the fibers vibration while not the aperture in it. It was proved that the vibration theory obtained by the membrane vibration analyze well agreement with test result of 30 kinds of nonwovens and fabrics.
membrane vibration theory specific acoustic impedance fibrous material sound absorption coefficient
Zhang Xinan
Institute of Acoustics, Tongji University, Shanghai 200092, China Key Laboratory of Shaanxi Province for Functional Fabric, Xian Polytechnic University, Xian 710048, China
国际会议
2006中国国际毛纺织会议暨IWTO羊毛论坛(2006 China International Wool Textile Conference & IWTO Wool Forum)
西安
英文
112-118
2006-11-19（万方平台首次上网日期，不代表论文的发表时间）