Title :
Near-field beamforming for microphone arrays
Author :
Ryan, James G. ; Goubran, Rafik A.
Author_Institution :
Inst. for Microstructural Sci., Nat. Res. Council of Canada, Ottawa, Ont., Canada
Abstract :
This paper describes the application of array optimization techniques to improving the near-field response of an arbitrary microphone array. The optimization exploits the differences in wavefront curvature between near-field and far-field sound sources and is suitable for reverberation reduction in small rooms. The optimum near-field beamformer provides increased array gain over that obtained from a uniformly weighted delay-and-sum beamformer
Keywords :
acoustic noise; acoustic signal processing; acoustic transducer arrays; architectural acoustics; array signal processing; direction-of-arrival estimation; microphones; noise abatement; optimisation; reverberation; array gain; array optimization techniques; far-field sound sources; microphone arrays; near-field beamforming; near-field response; near-field sound sources; optimum near-field beamformer; reverberation reduction; small rooms; uniformly weighted delay and sum beamformer; wavefront curvature; Acoustic arrays; Acoustic noise; Acoustic reflection; Acoustic waves; Apertures; Array signal processing; Equations; Microphone arrays; Optical reflection; Reverberation;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1997. ICASSP-97., 1997 IEEE International Conference on
Conference_Location :
Munich
Print_ISBN :
0-8186-7919-0
DOI :
10.1109/ICASSP.1997.599648
