CPX - Noise measurements according to the Close ProXimity method
The Close ProXimity (CPX) method is a method that measures tire-to-road noise using microphones placed near the tire of a wheel that is rolling on a road pavement. The main purpose of the CPX method is to assess both the acoustic quality and the homogeneity of a road surface over a given route.
The CPX method is used, among other things, for the classification of pavements according to their acoustic quality, for the evaluation of the influence of a certain intervention in the road surface on noise production, for the monitoring of the acoustic quality of a pavement over time and for the initial acoustic control at the time of the acceptance of pavement works.
