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

Elisabet Tiana Roig (Invited author), Finn Jacobsen (Invited author), Efren Fernandez Grande (Invited author)

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-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
Title of host publicationProceedings of Inter-Noise 2010
Publication date2010
Publication statusPublished - 2010
Event39th International Congress and Exposition on Noise Control Engineering - Lisbon, Portugal
Duration: 15 Jun 201016 Jun 2010
Conference number: 39
http://www.spacustica.pt/internoise2010/

Conference

Conference39th International Congress and Exposition on Noise Control Engineering
Number39
Country/TerritoryPortugal
CityLisbon
Period15/06/201016/06/2010
Internet address

Keywords

  • Delay-and-sum
  • Environmental noise
  • Circular harmonics
  • Circular arrays
  • Beamforming

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