| Title |
An Experimental Investigation on Noise Reduction Performance of the Absorption and the Resonance Type Duct Silencers |
| Authors |
이영섭(Young-Sup Lee) ; 정광섭(Kwang-Seop Chung) ; 이동훈(Dong-Hoon Lee) |
| Keywords |
흡음형 소음기 ; 유속 ; 삽입손실 ; 공명형 소음기 ; 잔향실 Absorption type silencer ; Flow velocity ; Insertion loss ; Resonance type silencer ; Reverberation room |
| 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. |