고층 건물에 인접한 방음벽의 삽입손실에 관한 연구

A Study of Barrier Insertion Loss Near a High Rise Building

  • 진병주 (한국과학기술원 기계공학과) ;
  • 김현실 (정회원, 한국기계연구원 구조시스템연구부) ;
  • 김상렬 (정회원, 한국기계연구원 구조시스템연구부)
  • 발행 : 2000.02.01

초록

In this paper performance of the noise barrier which is 53 m long and 6m high, and is located between the high rise apartment and road, is studied by using experimental and analytic method. The insertion loss is measured by using the direct method in accordance with the ISO code, while theoretical prediction is based on Muradali and Fyfe's method (Applied Acoustics, Vol. 53, 49~75, 1998). In addition to the diffraction at the top of the barrier, the waves are reflected infinite times between the building and the barrier, which is equivalent to replacing the building by the infinite series of the image receiver points. In two-dimensional study, the prediction of the insertion loss results in significantly overestimated values compared with the measurement. However three-dimensional analysis shows reasonable agreements, where traffic noise is assumed as incoherent line source and the length of the source is larger than that of the barrier.

키워드

참고문헌

  1. ISO 10847 In-Situ Determination of Insertion Loss of Outdoor Noise Barriers of All Types
  2. Applied Acoustics v.1 Noise Reduction by Screens Maekawa, Z
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  4. Applied Acoustics v.42 Using maekawa's Chart to Calculate Finite Length Barrier Insertion loss Lam, Y. W.
  5. Applied Acoustics v.53 A Study of 2D and 3D Barrier Insertion Loss using Improved Diffraction-Based Methods Muradali, A.;Fyfe, K. R.
  6. Applied Acoustics v.4 Sound Attenuation By Barriers Kurze, U. J.;Anderson, G. S.
  7. Journal of the Acoustical Society of America v.55 Diffraction of Sound Around Corners and Over Wide Barriers pierce, A. D.
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