Validation of a complex urban noise model close to a road

摘要

The adequacy of a model for the sound level close to a road is investigated by comparing resulting predictions for the sound level over a building facade with measurements. The road model involves the road geometry (the number and positions of traffic lanes), the traffic structure (vehicle flow rates and their average speeds in each lane) and equivalent omnidirectional point sources representing the vehicles. It is found that the assumed road traffic noise source model is adequate only for predicting levels over the higher part of the facade. However the investigation has allowed definition of what improvements are needed in the road source modelling to enable adequate predictions over the whole of the building facade.