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Research Reports

Attenuation of Sound as a Function of Barrier Angle

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.

  • 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