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Multi-Sound-Source Localization Using Machine Learning for Small Autonomous Unmanned Vehicles with a Self-Rotating Bi-Microphone Array

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Abstract

While vision-based localization techniques have been widely studied for small autonomous unmanned vehicles (SAUVs), sound-source localization capabilities have not been fully enabled for SAUVs. This paper presents two novel approaches for SAUVs to perform three-dimensional (3D) multi-sound-sources localization (MSSL) using only the inter-channel time difference (ICTD) signal generated by a self-rotating bi-microphone array. The proposed two approaches are based on two machine learning techniques viz., Density-Based Spatial Clustering of Applications with Noise (DBSCAN) and Random Sample Consensus (RANSAC) algorithms, respectively, whose performances were tested and compared in both simulations and experiments. The results show that both approaches are capable of correctly identifying the number of sound sources along with their 3D orientations in a reverberant environment.

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The data that support the findings of this study are available from the corresponding author, Deepak Gala, upon reasonable request.

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Funding

All authors confirm that there has been no significant financial support for this work that could have influenced its outcome.

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Authors and Affiliations

  1. Klipsch School of Electrical and Computer Engineering, New Mexico State University, Las Cruces, NM, 88001, USA

    Deepak Gala

  2. Department of Mechanical and Aerospace Engineering, New Mexico State University, Las Cruces, NM, 88001, USA

    Nathan Lindsay & Liang Sun

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  1. Deepak Gala
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  2. Nathan Lindsay
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  3. Liang Sun
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Contributions

Deepak Gala, developed the theoretical formalism, performed analytical analysis, performed numerical simulations, and planned the experiments. Also, he wrote the first draft of the manuscript, prepared relevant materials, and conducted result analyses. Nathan Lindsay, contributed to the design, prototyping, and integration of hardware components for the experimental platform, as well as conducting the experiments and data collection. Liang Sun, as the research advisor of the first and second authors, initiated the research work presented in the paper, developed the research plan for methodologies, simulations, experiments, analysis, and data collection, provided guidance for research discussions. All authors read and approved the revised manuscript.

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Correspondence to Deepak Gala.

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Gala, D., Lindsay, N. & Sun, L. Multi-Sound-Source Localization Using Machine Learning for Small Autonomous Unmanned Vehicles with a Self-Rotating Bi-Microphone Array. J Intell Robot Syst 103, 52 (2021). https://doi.org/10.1007/s10846-021-01481-4

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