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An Experimental Investigation on Noise Reduction Performance of the Absorption and the Resonance Type Duct Silencers  

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.)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.22, no.12, 2010 , pp. 897-901 More about this Journal
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
Absorption type silencer; Flow velocity; Insertion loss; Resonance type silencer; Reverberation room;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
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