• Title, Summary, Keyword: 소음쳄버

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An Experimental Study to Develop the Perforated Panel System for Noise Chamber (소음쳄버용 다공판 시스템 개발을 위한 실험적 연구)

  • Lee, Young-Sup;Lee, Dong-Hoon;Chung, Kwang-Seop
    • Journal of the Korean Society for Railway
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    • v.12 no.5
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    • pp.806-810
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    • 2009
  • The air conditioner system that is used in large structure, such as hospital, hotel, railway platform and train generate a high level noise generally. A chamber with sound absorbing materials, such as glass wool and polyurethane foam, are installed in this system to reduce the noise. However, these chambers cause environmental problems owing to the sound absorbing materials recently. Therefore, we develop noise chamber a built-in perforated panel resonance system as eco-friendly chamber to solve this problems. This noise chambers show the same noise reduction performance as the current chambers in the range above 500Hz. But, it reduces the noise up to 8dB(A) comparison to the current chambers in the range 200Hz~400Hz.