Actual vehicle measurements indicate that the best single frequency approximation for "A" weighted noise is 650 Hz. For light vehicles, the effective source height is 0.2 m (0.7 feet) above the lane surface. For heavy vehicles, the effective source height is 0.8 m (2.6 feet) above the lane surface.
July 29, 2007
Rene N. Foss.
University of Washington. Applied Physics Laboratory.
- # of Pages: 29 p., 928 KB (PDF)
- Subject: Audio frequency, Diffraction, Heavy vehicles, Height, Measurement, Noise, Noise barriers, Noise control, Sound attenuation, Traffic noise, Vehicles, Walls.
- Keywords: Highway acoustics, noise suppression, Fresnel diffraction.
- Related Publications:
Noise Barrier Screen Measurements, Single Barriers, (WA-RD 24.1). Attenuation of Sound as a Function of Barrier Angle, (WA-RD 24.2). Noise Barrier Screen Measurements, Double Barriers. (WA-RD 24.3).
Field Evaluation of Single Barriers, (WA-RD 24.5).
This abstract was last modified April 29, 2008