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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 method shows that the absorption coefficient of felt is higher than the absorption coefficient of carpet for mid and higher frequencies. Furthermore insertion loss (IL) of the felt was measured in a circular duct. It is found that felt can attenuate sound pressure level between 1 dB and 10 dB.
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篇名 Characterization of Acoustical Properties of Felt and Carpet Made of Natural and Environmentally Friendly Materials
来源期刊 声学期刊(英文) 学科 物理学
关键词 Absorption COEFFICIENT INSERTION Loss CARPET FELT SOUND PROPAGATION
年,卷(期) 2017,(2) 所属期刊栏目
研究方向 页码范围 27-38
页数 12页 分类号 O4
字数 语种
DOI
五维指标
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节点文献
Absorption
COEFFICIENT
INSERTION
Loss
CARPET
FELT
SOUND
PROPAGATION
研究起点
研究来源
研究分支
研究去脉
引文网络交叉学科
相关学者/机构
期刊影响力
声学期刊(英文)
季刊
2162-5786
武汉市江夏区汤逊湖北路38号光谷总部空间
出版文献量(篇)
117
总下载数(次)
0
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