A numerical study of sound propagation over urban canyons.
Paper in proceedings, 2008

Because quiet areas in dense urban environments are important, there is high interest in propagation to areas shielded from direct road traffic noise. Sound levels in shielded areas are strongly influenced by distant sources, so intermediate propagation factors such as metrology, screening, and intermediate canyons must therefore be addressed in a realistic propagation model. A numerical investigation of sound propagation across the open tops of intermediate urban canyons has been performed, using the Parabolic Equation and Equivalent Sources methods. Results have been collected for various canyon geometries, and the influence of multiple canyons, canyon/rooftop absorption, variable rooftop height, and correlated versus uncorrelated source models has been investigated. By characterizing the "insertion loss" of canyons intermediate to the source and receiver, the influence of these intermediate canyons could be addressed simply, without the overhead of a detailed numerical calculation.

Author

Martin T. Schiff

Chalmers, Civil and Environmental Engineering, Applied Acoustics

Maarten Hornikx

Chalmers, Civil and Environmental Engineering, Applied Acoustics, Vibroacoustics

Jens Forssén

Chalmers, Civil and Environmental Engineering, Applied Acoustics, Vibroacoustics

Proceedings of Meetings on Acoustics

1939800X (ISSN)

Vol. 4

Subject Categories

Fluid Mechanics and Acoustics

DOI

10.1121/1.2988049

More information

Latest update

11/21/2018