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.
July 31, 2007
Rene N. Foss.
University of Washington. Applied Physics Laboratory.
- # of Pages: 18 p., 533 KB (PDF)
- Subject: Acoustics, Diffraction, Mathematical models, Noise barriers, Noise control, Sound attenuation, Traffic noise.
- Keywords: Noise suppression, noise barriers, noise screens, highway acoustics, Fresnel diffraction.
- Related Publications: Noise Barrier Screen Measurements, Single Barriers, (WA-RD 24.1).
Noise Barrier Screen Measurements, Double Barriers. (WA-RD 24.3).
Vehicle Noise Radiation, Effective Height and Frequency Measurements, (WA-RD 24.4).
Field Evaluation of Single Barriers, (WA-RD 24.5).
This abstract was last modified April 29, 2008