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作者:

Zhao, Junjuan (Zhao, Junjuan.) | Li, Xianhui (Li, Xianhui.) | Zhang, Bin (Zhang, Bin.) | Wu, Rui (Wu, Rui.) | Zhang, Wei (Zhang, Wei.) | Gai, Xiaoling (Gai, Xiaoling.) | Qin, Qin (Qin, Qin.)

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EI Scopus

摘要:

Currently, there is a great interest in panel absorber design. These absorbers, except simple porous layers, are compound absorbers, i.e. They consist of elements in special arrangements, such as air volumes, foils (either limp or elastic, tight or porous), membranes, plates (either stiff or elastic, tight or porous) mostly with perforations in the shape of e.g. slits or circular holes, porous absorber layers, etc. For such absorbers, the challenge is to increase the natural, viscous losses to attain an acceptable absorption bandwidth. This paper presents a novel sound absorber of double-layer plate construction which involves a micro-perforated layer and a coating viscoelastic membrane layer which formed on outer surface of the micro-perforated layer. The purpose of this design is to increase the input impedance of such absorbers. The energy dissipation takes place in the double-layer plate construction, especially in the viscoelastic membrane layer where the viscous energy dissipation has been enhanced by the use of glue. The results by simulations had demonstrated such double-layer plate construction has outstanding sound absorption characteristics, excellent external appearance and good productivity. Copyright© (2013) by Austrian Noise Abatement Association (OAL).

关键词:

Acoustic noise Acoustic variables control Acoustic wave absorption Energy dissipation Measurement Quality control Sound insulating materials Viscoelasticity

作者机构:

  • [ 1 ] [Zhao, Junjuan]Beijing Key Lab of Environmental Noise and Vibration, Beijing, China
  • [ 2 ] [Li, Xianhui]Beijing Key Lab of Environmental Noise and Vibration, Beijing, China
  • [ 3 ] [Zhang, Bin]Beijing Key Lab of Environmental Noise and Vibration, Beijing, China
  • [ 4 ] [Wu, Rui]Beijing Key Lab of Environmental Noise and Vibration, Beijing, China
  • [ 5 ] [Zhang, Wei]College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing, China
  • [ 6 ] [Gai, Xiaoling]Beijing Key Lab of Environmental Noise and Vibration, Beijing, China
  • [ 7 ] [Qin, Qin]Beijing Key Lab of Environmental Noise and Vibration, Beijing, China

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年份: 2013

卷: 5

页码: 4256-4261

语种: 英文

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