Description: 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.

Full Report (pdf 0.52 MB)

• Date Published: March, 1976
• Publication Number: WA-RD 24.2
• Last Modified: July 31, 2007
• Author: Rene N. Foss.
• Originator: 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