This study investigated the noise produced by a single passenger vehicle tire heard at the roadside. This report presents the study's equipment and the development of the data reduction techniques. To choose test sites, selection criteria were applied that would prevent extraneous artifacts from influencing the results of the study. Special care was taken to minimize microphone wind noise caused by the high-speed turbulent flow of the measurement process. Measurements were taken on both old and new Class B asphalt, Class D asphalt, and portland cement concrete pavement. The results are presented in graphical form. The results indicated that the class D asphalt surfaces measured in this study did not produce lower roadside tire noise, and these surfaces were no more acoustically absorbent than the other road surfaces.
Washington State Transportation Center (TRAC)
Asphalt pavements, Concrete pavements, Data reduction, Graphics, Measuring instruments, Portland cement, Roadside, Rolling contact, Tire/pavement noise, Tires, Traffic noise.