Textile Science and Engineering (한국섬유공학회지)

The Korean Fiber Society (한국섬유공학회)
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Sound Absorption Characteristics of Porous Fibrous Materials with Different Density Distributions

다공질형 섬유재료의 밀도 분포 변화에 따른 흡음특성에 관한 연구

  • Received : 2018.08.14
  • Accepted : 2018.10.17
  • Published : 2018.10.31
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Abstract

To improve the acoustic performance of porous fibrous materials, the material thickness should be increased or nonwoven fabrics with a double layered-system should be used as described in the previous paper [2]. In this study, the sound absorption characteristics of nonwoven fabrics with double-layered and triple-layered systems and different density distributions were investigated using an impedance-tube method. In the case of a double-layered system, the results show that a higher face material density increased the sound absorption coefficient in the middle-frequency region. In case of a triple-layered system, when combined with three kinds of materials, under the same condition of face material, a greater density difference with nonwoven in the back resulted in an increased sound absorption coefficient in the middle-frequency region.

Keywords

References

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