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.
University of Washington. Applied Physics Laboratory.
Acoustics, Diffraction, Mathematical models, Noise barriers, Noise control, Sound attenuation, Traffic noise.