The  Scattering  Of 3D  Sound  Sources  By  Rigid

Barriers In The Vicinity  Of Tall Buildings

L. Godinho; J. Antonio; A. Tadeu

doi:10.2495/BE000501

The Scattering Of 3D Sound Sources By Rigid Barriers In The Vicinity Of Tall Buildings

Price

Free (open access)

Transaction

WIT Transactions on Modelling and Simulation

Volume

Pages

Published

2000

Size

1,170 kb

Paper DOI

10.2495/BE000501

WIT Press

Author(s)

L. Godinho, J. Antonio & A. Tadeu

Abstract

The scattering of 3D sound sources by rigid barriers in the vicinity of tall buildings L. Godinho, J. Antonio & A. Tadeu Department of Civil Engineering University of Coimbra, Portugal Abstract The Boundary Element Method (BEM) is used to evaluate the acoustic scattering of a three-dimensional sound source by an infinitely long rigid barrier in the vicinity of a tall building. The barrier is assumed to be non-absorbing and the buildings are modeled as an infinite barrier. The calculations are performed in the frequency domain and time signatures are obtained by means of Inverse Fourier Transforms. The 3D solution is obtained by means of Fourier Transform in the direction in which the geometry does not vary. This requires solving a sequence of 2D problems with different spatial wavenumbers, k^. The wavenumber transform in discrete form is obtained by considering an infinite number of virtual point sources equally spaced along the z axis. Complex frequencies are used

Keywords

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Code

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