کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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755417 | 1462437 | 2007 | 16 صفحه PDF | دانلود رایگان |
The acoustic performance of pairs of diffusive roadside barriers is tested experimentally on a 1:10 scale model, and compared to that of more traditional specularly reflecting barriers. Significant attenuation benefits are detected not only in the shadow zone behind the barriers, but also in the unprotected zone immediately above the barriers, thus proving that diffusive traffic faces of the barriers may effectively help in counteracting multiple reflection effects. In addition, a radiosity-based theoretical model developed for the evaluation of the sound field behind pairs of diffusive noise barriers is described, and its ability to predict the extra SPL attenuation deriving from the replacement of geometrically reflecting barriers with diffusely reflecting barriers is verified.
Journal: Applied Acoustics - Volume 68, Issues 11–12, November–December 2007, Pages 1357–1372