Beamforming with a circular microphone array for localization of environmental noise sources

Elisabet Tiana Roig, Finn Jacobsen, Efren Fernandez Grande

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

It is often enough to localize environmental sources of noise from different directions in a plane. This can be accomplished with a circular microphone array, which can be designed to have practically the same resolution over 360. The microphones can be suspended in free space or they can be mounted on a solid cylinder. This investigation examines and compares two techniques based on such arrays, the classical delay-and-sum beamforming and an alternative method called circular harmonics beamforming. The latter is based on decomposing the sound field into a series of circular harmonics. The performance of the two signal processing techniques is examined using computer simulations, and the results are validated experimentally.
Original languageEnglish
JournalAcoustical Society of America. Journal
Volume128
Issue number6
Pages (from-to)3535-3542
ISSN0001-4966
DOIs
Publication statusPublished - 2010

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