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Noise propagation from a cutting of arbitrary cross-section and impedance

Peplow, A.T. and Chandler-Wilde, S. N. (1999) Noise propagation from a cutting of arbitrary cross-section and impedance. Journal of Sound and Vibration, 223 (3). pp. 355-378. ISSN 0022-460X

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To link to this item DOI: 10.1006/jsvi.1999.2126

Abstract/Summary

A boundary integral equation is described for the prediction of acoustic propagation from a monofrequency coherent line source in a cutting with impedance boundary conditions onto surrounding flat impedance ground. The problem is stated as a boundary value problem for the Helmholtz equation and is subsequently reformulated as a system of boundary integral equations via Green's theorem. It is shown that the integral equation formulation has a unique solution at all wavenumbers. The numerical solution of the coupled boundary integral equations by a simple boundary element method is then described. The convergence of the numerical scheme is demonstrated experimentally. Predictions of A-weighted excess attenuation for a traffic noise spectrum are made illustrating the effects of varying the depth of the cutting and the absorbency of the surrounding ground surface.

Item Type:Article
Refereed:Yes
Divisions:Faculty of Science > School of Mathematical, Physical and Computational Sciences > Department of Mathematics and Statistics
ID Code:32650
Publisher:Elsevier

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