The Performance Of Multiple Noise Barriers

A numerical model, based on boundary element techniques, was used to solve the acoustic wave equation in two dimensions, in order to study the performance of various configurations of road traffic noise barriers. The mean insertion loss for a broadband road traffic noise source over a range of recei...

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Bibliographic Details
Published in:Journal of sound and vibration 1994-09, Vol.176 (4), p.459-473
Main Authors: Crombie, D.H., Hothersall, D.C.
Format: Article
Language:English
Subjects:
Acoustics
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Noise: its effects and control
Physics
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Summary:A numerical model, based on boundary element techniques, was used to solve the acoustic wave equation in two dimensions, in order to study the performance of various configurations of road traffic noise barriers. The mean insertion loss for a broadband road traffic noise source over a range of receiver positions behind the barrier is used as a measure of efficiency. Barriers comprised of several parallel screens on the same side of the road are evaluated in terms of number and separation, and are compared with a single screen and results of experimental modelling. The effects of placing absorbent treatment on the surfaces of the screens and on the ground surface are also considered. Multiple-edged barriers with a single foundation and multiple earth mounds are discussed, as well as effects relating to multiple reflections of sound from high vehicles and from parallel screens on the opposite side of the road.
ISSN:0022-460X
1095-8568
DOI:10.1006/jsvi.1994.1389