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Sound localization for ad‐hoc microphone arrays

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journal contribution
posted on 2021-06-02, 00:00 authored by M U Liaquat, H S Munawar, A Rahman, Z Qadir, Abbas KouzaniAbbas Kouzani, M A Parvez Mahmud
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%.

History

Journal

Energies

Volume

14

Issue

12

Article number

3446

Pagination

1 - 27

Publisher

MDPI AG

Location

Basel, Switzerland

eISSN

1996-1073

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

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