대한환경공학회지 (Journal of Korean Society of Environmental Engineers)
- 제22권10호
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- Pages.1843-1850
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- 2000
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- 1225-5025(pISSN)
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- 2383-7810(eISSN)
흡음형 방음판넬의 음향특성
The Acoustical Characteristics of an Absorptive Panel
- Hwang, Cheol Ho (Department of Mechanical Engineering, Hannam University) ;
- Jung, Sung Soo (Acoustic and Vibration Group, Korea Research Institute of Standards and Science) ;
- Lee, Woo Seop (Acoustic and Vibration Group, Korea Research Institute of Standards and Science) ;
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Kim, Yong Tae
(Acoustic and Vibration Group, Korea Research Institute of Standards and Science)
- 투고 : 2000.03.08
- 심사 : 2000.08.10
- 발행 : 2000.10.30
초록
다공판과 흡음재, 그리고 공기총으로 구생되는 방음판에 대한 흡음계수를 측정하고 이론값과 비교하였다. 방음판은 세 가지 기본적인 조합물(다공판 + 공기층 + 흡용재, 다공판 + 흡음재, 다공판 + 흡음재 + 공기층)으로 구성하였다. 실험결과 저주파수 영역의 흡음력은 다공판과 공기층으로 구성되는 공명형 구조물의 공명 흡음에, 그리고 고주파수 영역은 다공판의 기공률에 크게 영향을 받음을 알 수 있었다.
Sound absorption coefficient for the absorptive panels comprized of a perforated plate. an absorbent material and an air gap was measured and compared with theoretical value. The absorptive panels are composed of three basic combinations (a perforated plate + an air gap + an absorbent material. a perforated plate + an absorbent material, a perforated plate + an absorbent material + an air gap). As a result. it is found that the sound absorption for low frequency range is strongly affected by the resonance produced by perforated plate and air gap. And the sound absorption for high frequency depends on the porosity of perforated plate.