NDLI: Generalized framework for spherical microphone arrays: Spatial and frequency decomposition

Content Provider	IEEE Xplore Digital Library
Author	Abhayapala, T.D.
Copyright Year	2008
Description	Author affiliation: Dept. of Inf. Eng., Australian Nat. Univ., Acton, ACT (Abhayapala, T.D.)
Abstract	This paper provides a generalized framework to decompose a sourcefield into its spatial and frequency components using a spherical microphone array. Spherical arrays are used to decompose a soundfield into spherical harmonics which are the natural basis functions for space over directions. This paper extends this theory by including basis functions in frequency to decompose a soundfield into spatial-frequency components. Specifically, we use spherical Bessel functions as a set of basis in frequency. The paper also shows how to avoid numerical ill-conditioning inherited in open spherical arrays at frequencies corresponding to Bessel zeros.
Starting Page	5268
Ending Page	5271
File Size	110623
Page Count	4
File Format	PDF
ISBN	9781424414833
ISSN	15206149
DOI	10.1109/ICASSP.2008.4518848
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-03-31
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Microphone arrays Power harmonic filters Acoustical engineering Array signal processing Frequency dependence Filtering Speech enhancement Surveillance Acoustic propagation Joining processes Fourier spherical Bessel series Spherical microphone array spatial decomposition sound field beamforming
Content Type	Text
Resource Type	Article

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