Answers are grounded in this paper and cite their sources.
This paper describes a method for counting the vehicles and estimating the direction of their motion using three equidistantly spaced microphones. Paper outlines hardware and software design. Algorithm is based on sound delay estimation between microphones. To implement vehicle counting, sound wave arrival angle is calculated from the derived delays. All measurements and tests took place in real traffic flow under different weather conditions. DOI: http://dx.doi.org/10.5755/j01.eee.19.8.5400
No takes yet. Share an insight, caveat, or question.
Severdaks et al. (2013) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: