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- W652288733 abstract "Semi-empirical methods based on ray tracing and geometrical acoustics are frequently used in acoustical analysis. However, these methods are usually applicable to noise barriers with simple configurations and are unable to treat complex diffraction and multiple scattering effects. For the latter problems, the Boundary Element Method (BEM) appears to be a viable approach to compute the acoustical performance of such noise barriers. In this paper, the BEM is used to predict the acoustical performance of single vertical noise barriers, double vertical noise barriers, barriers with T -shaped top edge, barriers with Big-cap top edge as well as barriers with multiple top edges. All of these barriers have similar acoustical geometry. Comparisons of their effectiveness of noise reduction at different receivers are presented. Numerical results show that the double vertical barrier can exhibit much better performance than the single vertical barrier. The acoustical performances of other kinds of barriers are varied at different frequencies. Contour maps to indicate the sound pressure distribution behind these barriers are also presented. (A) For the covering abstract see ITRD E113232." @default.
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- W652288733 date "2001-01-01" @default.
- W652288733 modified "2023-09-28" @default.
- W652288733 title "PERFORMANCE OF NOISE BARRIERS OF DIFFERENT TOP EDGE DESIGNS" @default.
- W652288733 hasPublicationYear "2001" @default.
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