SEDL / STP / STP1555-EB / STP104444

Measuring and Visualizing Tire–Pavement Noise Using On-Board Sound Intensity

Rasmussen, Robert Otto
The Transtec Group, Inc., Austin, TX

Sohaney, Richard C.
The Transtec Group, Inc., Austin, TX

Pages: 10    Published: Nov 2012

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Abstract

The Concrete Pavement Surface Characteristics Program (CPSCP) has recently developed guidelines and practices for reducing tire– pavement noise. The primary means for doing this is via measurements using the on-board sound intensity (OBSI) technique. OBSI measures tire-pavement noise at the source utilizing specialized microphones mounted to the outside of a vehicle, near the tire–pavement interface. Measurements are performed while the vehicle drives across the pavement being evaluated. To facilitate innovation, specifications have been developed based on an end-result approach. In this paper, a means for how to measure OBSI is provided, along with a means to interpret the as-constructed quality through visualization techniques. With it, the spatial variability of tire-pavement noise, as measured using OBSI, can be readily determined.