Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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An Experimental Investigation on Noise Reduction Performance of the Absorption and the Resonance Type Duct Silencers

흡음형과 공명형 덕트 소음기의 소음저감 성능에 관한 실험적 고찰

  • Lee, Young-Sup (Department of Rolling Stock System, Graduate School of Railroad, of Seoul National Univ. of Tech.) ;
  • Chung, Kwang-Seop (Department of Architectural Engineering, Seoul National Univ. of Tech.) ;
  • Lee, Dong-Hoon (Department of Mechanical Engineering, Seoul National Univ. of Tech.)
  • 이영섭 (서울산업대학교 철도전문대학원 철도시스템공학과) ;
  • 정광섭 (서울산업대학교 건축공학과) ;
  • 이동훈 (서울산업대학교 기계공학과)
  • Received : 2010.08.14
  • Accepted : 2010.10.12
  • Published : 2010.12.10
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Abstract

A silencer has been widely used for the purpose of suppressing the noises propagated from duct of air conditioning system. The absorption type silencer is usually applied to reduce the noise with high frequency bandwidth. On the order hand, the resonance type silencer is applied to reduce the noise with low-middle frequency bandwidth. The insertion loss of silencer is measured in the reverberation room. The cut-off frequency of reverberation room is 100 Hz. The insertion loss of absorption type silencer is more larger than that for resonance type silencer regardless of changing the flow velocity.

Keywords

References

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