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Title:
CONCENTRIC CIRCULAR DIFFERENTIAL MICROPHONE ARRAYS AND ASSOCIATED BEAMFORMING
Document Type and Number:
WIPO Patent Application WO/2018/087590
Kind Code:
A3
Abstract:
A differential microphone array includes a plurality of microphones situated on a substantially planar platform, the plurality of microphones including a total number (M) of microphones and at least two subsets of the plurality of microphones situated along at least two substantially concentric ellipses with respect to a center, and a processing device, communicatively coupled to the plurality of microphones, to receive a plurality of electronic signals generated by the plurality of microphones responsive to a sound source and execute a minimum-norm beamformer to calculate an estimate of the sound source based on the plurality of electronic signals, in which the minimum-norm beamformer has a differential order (N), and wherein M > N+1.

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Inventors:
CHEN JINGDONG (CN)
HUANG GONGPING (CN)
BENESTY JACOB (CA)
Application Number:
PCT/IB2017/001436
Publication Date:
June 28, 2018
Filing Date:
October 24, 2017
Export Citation:
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Assignee:
UNIV NORTHWESTERN POLYTECHNICAL (CN)
International Classes:
H04R29/00; H04R3/00
Foreign References:
US20150163577A12015-06-11
US20150117672A12015-04-30
US20120140947A12012-06-07
Other References:
PAN, CHAO ET AL.: "ON THE NOISE REDUCTION PERFORMANCE OF THE MVDR BEAMFORMER IN NOISY AND REVERBERANT ENVIRONMENTS", 2014 IEEE INTERNATIONAL CONFERENCE ON ACOUSTIC, SPEECH AND SIGNAL PROCESSING (ICASSP, 31 December 2014 (2014-12-31), XP032618230
PAN, CHAO ET AL.: "THEORETICAL ANALYSIS OF DIFFERENTIAL MICROPHONE ARRAY BEAMFORMING AND AN IMPROVED SOLUTION", IEEE /ACM TRANSACTIONS ON AUDIO, SPEECH, AND LANGUAGE PROCESSING, vol. 23, no. 11, 30 November 2015 (2015-11-30), XP058072955
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