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. (c) 2006 Elsevier Ltd. All rights reserved.

Experimental verification of the acoustic performance of diffusive roadside noise barriers / Cianfrini, Claudio; Corcione, Massimo; Fontana, Lucia. - In: APPLIED ACOUSTICS. - ISSN 0003-682X. - STAMPA. - 68:11-12(2007), pp. 1357-1372. [10.1016/j.apacoust.2006.07.018]

Experimental verification of the acoustic performance of diffusive roadside noise barriers

CIANFRINI, Claudio;CORCIONE, Massimo;FONTANA, Lucia
2007

Abstract

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. (c) 2006 Elsevier Ltd. All rights reserved.
2007
diffusive sound reflection; experimental analysis; theoretical/computer model; traffic noise barriers
01 Pubblicazione su rivista::01a Articolo in rivista
Experimental verification of the acoustic performance of diffusive roadside noise barriers / Cianfrini, Claudio; Corcione, Massimo; Fontana, Lucia. - In: APPLIED ACOUSTICS. - ISSN 0003-682X. - STAMPA. - 68:11-12(2007), pp. 1357-1372. [10.1016/j.apacoust.2006.07.018]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/232361
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