Sound localization for ad‐hoc microphone arrays

Muhammad Usman Liaquat, Hafiz Suliman Munawar, Amna Rahman, Zakria Qadir*, Abbas Z. Kouzani, M. A. Parvez Mahmud

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)
20 Downloads (Pure)


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, communica-tion, 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 disad-vantages 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‐di-mensional 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 re-duce the complexity of the algorithm and the computation time as well. The method results in nov-elty 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%.

Original languageEnglish
Article number3446
Pages (from-to)1-27
Number of pages27
Issue number12
Publication statusPublished - 2 Jun 2021
Externally publishedYes

Bibliographical note

Copyright the Author(s) 2021. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.


  • sound localization
  • DOA
  • 3D space
  • microphone array


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