Author(s)

S.J. Hsiao & L.H. Huang

Abstract

In the present work, the diffracted sound field of noise barriers is studied by two-dimensional boundary integral element method. By dividing the computation into two catagories based on the specific acoustic impedance of boundary, we can handle problems with arbitrary boundary acoustic impedance easily. Six nodal points per wave length, arid Gaussian quadru- ture integration with second order Lagrange's interpolation function for each three-nodal-point element are suggested for the computation. From the computational results of the neighbouring sound field of noise barri- ers, it is found that only the shape of noise barriers plays a major role in reducing neighbouring noise, while the height and the material are not important. 1 Introduction The mitigation of noise pollution is getting more and more important re- cently

Keywords