Reference : Microphone arrays fundamentals
Scientific congresses and symposiums : Unpublished conference
Engineering, computing & technology : Electrical & electronics engineering
http://hdl.handle.net/2268/119166
Microphone arrays fundamentals
English
[en] Principes de base des réseaux de microphones
Embrechts, Jean-Jacques mailto [Université de Liège - ULg > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Techniques du son et de l'image >]
23-Nov-2011
21
No
Yes
National
Journée ABAV "Multiple microphones systems"
23/11/2011
ABAV (Association belge des acousticiens)
Liège
Belgique
[en] Microphone arrays are essentially directional sensors. They are therefore mainly used for locating, identifying, isolating, measuring and recording individual sound sources. The main principles governing the directivity of microphone arrays are reviewed: phase differences between signals create constructive and destructive interferences, depending on the direction of the sound source. Moreover, signal processing is applied to provide “beamforming”, i.e. beam shaping and steering. Contrary to continuous antenna, discrete arrays can create aliasing, which can result in false detections of sound sources. The delay-and-sum and filter-and-sum beamformers are described. Finally, as simple beamformers are often frequency dependent, some solutions to obtain constant (broad-band) directivity are presented.
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/119166

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