Improving the Localization Accuracy of Dipole Sound Sources Using Planar Microphone Arrays

V. F. Kopiev; Копьев В. Ф.; V. V. Ershov; Ершов В. В.; I. V. Khramtsov; Храмцов И. В.; O. Yu. Kustov; Кустов О. Ю.

doi:10.31857/S0320791923600063

Improving the Localization Accuracy of Dipole Sound Sources Using Planar Microphone Arrays

Authors: Kopiev V.F.¹, Ershov V.V.², Khramtsov I.V.², Kustov O.Y.²
Affiliations:
1. Moscow Research Complex Central Aerohydrodamic Institute (TsAGI), 105005, Moscow, Russia
2. Perm National Research Polytechnic University, 614990, Perm, Russia
Issue: Vol 69, No 2 (2023)
Pages: 191-206
Section: АТМОСФЕРНАЯ И АЭРОАКУСТИКА
URL: https://journals.rcsi.science/0320-7919/article/view/134427
DOI: https://doi.org/10.31857/S0320791923600063
EDN: https://elibrary.ru/IUGYUM
ID: 134427

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Abstract
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Abstract

A method has been developed for tuning the microphone array for optimal visualization of acoustic dipoles. Acoustic dipoles were generated under experimental conditions in an anechoic chamber using a subsonic air flow around a thin metal rod and thin rectangular plate. To confirm the operability of this approach, we compared the visualization maps obtained using the approach with the results obtained with a similar array class tuned in the traditional monopole method. The developed approach, which adapts the array to the dipole radiation model and modifies the transfer functions that take into account the influence of the incidence pattern of sound waves, demonstrates an increase in the array’s dynamic range with optimal microphone placement.

Keywords

microphone array, planar beamforming, acoustic dipole, noise source localization

References

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