A traffic-noise-map update method based on monitoring data.

The traffic noise map is an important tool for environmental noise management, whose update is notably necessary. A method to quickly update the noise map based on a few noise-monitoring data points is proposed to avoid recollecting regional traffic data and a large amount of noise monitoring. The noise-monitoring data of roads with monitoring are compared with the original noise data in the noise map to obtain the deviation, and the roads that share the similar characteristic as sound sources are clustered. The roads without monitoring are corrected by the average noise deviation of the road class whose characteristic as a sound source is close to the characteristic as a sound source. The update accuracy of this method is analyzed, and a formula to calculate the precision is proposed. Finally, experiments to verify the method and its accuracy are organized; the results show that the method accurately and rapidly updates the noise map.