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Article

Sound Localization for Ad-Hoc Microphone Arrays

1
Department of Electronics Engineering, North Ryde Campus, Macquarie University, Macquarie Park, NSW 2109, Australia
2
School of Built Environment, University of New South Wales, Kensington, Sydney, NSW 2052, Australia
3
Department of Computer Engineering, National University of Sciences and Technology, Islamabad 44000, Pakistan
4
School of Computing Engineering and Mathematics, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia
5
School of Engineering, Deakin University, Geelong, VIC 3216, Australia
*
Author to whom correspondence should be addressed.
Energies 2021, 14(12), 3446; https://doi.org/10.3390/en14123446
Received: 7 May 2021 / Revised: 4 June 2021 / Accepted: 9 June 2021 / Published: 10 June 2021
Sound localization is a field of signal processing that deals with identifying the origin of a detected sound signal. This involves determining the direction and distance of the source of the sound. Some useful applications of this phenomenon exists in speech enhancement, communication, radars and in the medical field as well. The experimental arrangement requires the use of microphone arrays which record the sound signal. Some methods involve using ad-hoc arrays of microphones because of their demonstrated advantages over other arrays. In this research project, the existing sound localization methods have been explored to analyze the advantages and disadvantages of each method. A novel sound localization routine has been formulated which uses both the direction of arrival (DOA) of the sound signal along with the location estimation in three-dimensional space to precisely locate a sound source. The experimental arrangement consists of four microphones and a single sound source. Previously, sound source has been localized using six or more microphones. The precision of sound localization has been demonstrated to increase with the use of more microphones. In this research, however, we minimized the use of microphones to reduce the complexity of the algorithm and the computation time as well. The method results in novelty in the field of sound source localization by using less resources and providing results that are at par with the more complex methods requiring more microphones and additional tools to locate the sound source. The average accuracy of the system is found to be 96.77% with an error factor of 3.8%. View Full-Text
Keywords: sound localization; DOA; 3D space; microphone array sound localization; DOA; 3D space; microphone array
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MDPI and ACS Style

Liaquat, M.U.; Munawar, H.S.; Rahman, A.; Qadir, Z.; Kouzani, A.Z.; Mahmud, M.A.P. Sound Localization for Ad-Hoc Microphone Arrays. Energies 2021, 14, 3446. https://doi.org/10.3390/en14123446

AMA Style

Liaquat MU, Munawar HS, Rahman A, Qadir Z, Kouzani AZ, Mahmud MAP. Sound Localization for Ad-Hoc Microphone Arrays. Energies. 2021; 14(12):3446. https://doi.org/10.3390/en14123446

Chicago/Turabian Style

Liaquat, Muhammad U.; Munawar, Hafiz S.; Rahman, Amna; Qadir, Zakria; Kouzani, Abbas Z.; Mahmud, M. A.P. 2021. "Sound Localization for Ad-Hoc Microphone Arrays" Energies 14, no. 12: 3446. https://doi.org/10.3390/en14123446

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