흡음형과 공명형 덕트 소음기의 소음저감 성능에 관한 실험적 고찰

다국어 초록 (Multilingual 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 ㎐. The insertion loss of absorption type silencer is more larger than that for resonance type silencer regardless of changing the flow velocity.

목차 (Table of Contents)

• ABSTRACT
• 1. 서론
• 2. 실험장치 및 방법
• 3. 실험결과 및 고찰
• 4. 결론
• 참고문헌

참고문헌 (Reference)

1 이동훈, "헬름홀츠 공명기의 흡음성능에 관한 연구" 한국소음진동공학회 18 (18): 71-79, 2008

2 이동훈, "전달행렬법을 이용한 다중 다공판 시스템의 흡음성능 예측" 한국소음진동공학회 12 (12): 7-716, 2002

3 이영섭, "소음쳄버용 다공판 시스템 개발을 위한 실험적 연구" 한국철도학회 12 (12): 806-810, 2009

4 Hur, S. C, "Sound Absorbing Performances of Parallel Perforated Plate Systems Combined with Absorbing Materials" 444-449, 2002

5 ISO 7235, "Laboratory measurement procedures for ducted silencers and air terminal units-Insertion loss"

6 Lee, D. H, "Estimation of the absorption performance of multiple layer perforated plate systems by transfer matrix method" 278 : 847-860, 2004

7 Oh, J. W, "Development of vibration silencer for noise reduction of apartments" 1247-1251, 2006