Journal article
Beamforming with a circular microphone array for localization of environmental noise sources
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.
Language: | English |
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Publisher: | Acoustical Society of America |
Year: | 2010 |
Pages: | 3535-3542 |
ISSN: | 15208524 , 00014966 and 01630962 |
Types: | Journal article |
DOI: | 10.1121/1.3500669 |
ORCIDs: | Fernandez Grande, Efren |