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arXiv · 2010.11659

Neural Network-based Acoustic Vehicle Counting

Slobodan Djukanović·Yash Patel·Jiři Matas·Tuomas Virtanen
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Abstract

This paper addresses acoustic vehicle counting using one-channel audio. We predict the pass-by instants of vehicles from local minima of clipped vehicle-to-microphone distance. This distance is predicted from audio using a two-stage (coarse-fine) regression, with both stages realised via neural networks (NNs). Experiments show that the NN-based distance regression outperforms by far the previously proposed support vector regression. The $ 95\% $ confidence interval for the mean of vehicle counting error is within $[0.28\%, -0.55\%]$. Besides the minima-based counting, we propose a deep learning counting that operates on the predicted distance without detecting local minima. Although outperformed in accuracy by the former approach, deep counting has a significant advantage in that it does not depend on minima detection parameters. Results also show that removing low frequencies in features improves the counting performance.

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BibTeXRIS

Slobodan Djukanović, Yash Patel, Jiři Matas, Tuomas Virtanen. 2020-10-22. Neural Network-based Acoustic Vehicle Counting. https://arxiv.org/abs/2010.11659

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