Characterization of Acoustical Properties of Felt and Carpet Made of Natural and Environmentally Friendly Materials
作者: Haydar Aygün
刊名: Open Journal of Acoustics, 2017, Vol.7 (2), pp.27-38
来源数据库: Scientific Research Publishing Journal
DOI: 10.4236/oja.2017.72004
原始语种摘要: Sound absorbers including porous materials are used widely for noise control. The most widely-exploited and acknowledged absorption mechanism in porous materials is viscous friction due to relative motion between solid and fluid. Acoustical performance of woven (carpet) and nonwoven (felt) materials made of wool using a traditional technique was investigated. Absorption coefficient of felt was measured using standing wave tube method with and without an air cavity. Data were compared with predictions determined using the laws of Delany and Bazely. Very good agreement between data and predictions was observed. Sound absorption coefficients of both materials also were measured using an impedance gun technique over a wider frequency range. Absorption coefficient obtained using impedance gun...
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  • absorption 吸收
  • coefficient 系数
  • materials 工业三废
  • impedance 阻抗
  • between 在中间
  • agreement 协议
  • cavity 
  • porous 多孔的
  • woven 编织
  • measured 量过的