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Aircraft sound localization using directional-microphone arrays

Aircraft sound localization using directional-microphone arrays

Category
Part of a book/report
Abstract
In the presence of ground reflections, the traditional methods for aircraft noise direction of arrival estimation based on the time differences between the microphones of a compact array lose accuracy in the vertical direction. With the aim of reducing this error, this work explores the use of directional instead of omnidirectional microphones in a tetrahedral array geometry. The theoretical advantages of using directional microphones are analyzed, and in the particular case of first-order directivity, it is shown, by computer simulation and by experimental measurements of jet and propeller aircraft take-offs, that the improvement is relevant.
Language
English
Author(s)
Affiliation
  • Norwegian University of Science and Technology
  • SINTEF Digital / Connectivity Technologies and Platforms
Year
2014
Published in
Forum Acusticum
ISSN
2221-3767
Publisher
European Acoustics Association (EAA)
Book
Proceedings of the Forum Acusticum 2014, Krakow, 7-12 September, 2014,
Booklet
2014