Noise Session 2 aNSa : Transportation Noise 2 aNSa 2 . Pass - by noise acoustic sensing for estimating speed and wheelbase length of two -

This paper focuses on acoustic road traffic monitoring and looks, more specifically, into the problem of joint speed and wheelbase length estimation of two-axle vehicles as they pass by. It is known that both front and rear axle trajectories may be observed using a cross-correlation based processing in conjunction with a well designed two-element microphone array placed on the roadside. This is mainly due to the broadband nature of the tyre/road noise which makes two peaks appear in, one per axle, in the correlation function. In a former work, we proposed to conduct this double-peak-tracking problem using a specific particle filter that model road vehicles as bimodal sound sources (bimodal particle filter). After a brief theoretical recall of the method, this paper stresses on the recent preliminary results we obtained from simulation and in-situ experiments.