Attenuation of Sound as a Function of Barrier Angle

Oblique wall noise barriers were investigated for angular dependence of attenuation. Experiments with a model at 5 kHz showed less than 1 dB difference from normal incidence to 45 incidence. Variations may approach 2 dB at angles near 70 from normal incidence. Thus, the obliqueness of the wall may be neglected for most practical problems.

Publication Date: 
Thursday, March 4, 1976
Publication Number: 
WA-RD 24.2
Last modified: 
09/28/2016 - 14:49
Authors: 
Rene N. Foss.
Originator: 
University of Washington. Applied Physics Laboratory.
Number of Pages: 
18
Subject: 
Acoustics, Diffraction, Mathematical models, Noise barriers, Noise control, Sound attenuation, Traffic noise.