NDLI: Investigating the Action of Complex Highway Noise Barriers by Means of Sound Field Visualization

Content Provider	IEEE Xplore Digital Library
Author	Oldham, D.J. Egan, C.A.
Copyright Year	2007
Description	Author affiliation: Acoust. Res. Unit, Liverpool Univ., Liverpool (Oldham, D.J.; Egan, C.A.)
Abstract	The performance of a simple noise barrier is determined by its height relative to the heights of the noise source and receivers. There have been many attempts to overcome this limitation by modifications to the barrier top edge. These generally take the form of an absorbent top or the introduction of additional diffracting edges. However, relatively minor variations in geometry have sometimes been found to result in drastic changes to barrier performance. In this paper the Boundary Element Method is employed to calculate the sound field in the vicinity of complex barrier tops and sound field visualization techniques are used with these data to investigate how the sound field varies with frequency and dimensional changes. It is shown that for some top edge configurations local resonance effects have a significant effect on the attenuation afforded by the barrier.
Starting Page	522
Ending Page	527
File Size	318250
Page Count	6
File Format	PDF
ISBN	0769529283
DOI	10.1109/CGIV.2007.55
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-08-14
Publisher Place	Thailand
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Road transportation Geometry Acoustical engineering Diffraction Acoustic noise Data visualization Boundary element methods Frequency Attenuation Resonance sound field visualization noise barriers.
Content Type	Text
Resource Type	Article

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