Title:
FLEXIBLE DIFFERENTIAL MICROPHONE ARRAYS WITH FRACTIONAL ORDER
Document Type and Number:
WIPO Patent Application WO/2020/186434
Kind Code:
A1
Abstract:
A beamformer, for a differential microphone array (DMA) including a number M of microphones, is constructed based on a specified target directivity factor (DF) value for the DMA. An N order beampattern is generated for the DMA, wherein N is an integer and a first DF value corresponding to the N order beampattern is greater than the target DF value. An N-1 order beampattern is generated for the DMA, wherein a second DF value corresponding to the N-1order beampattern is greater than the target DF value. A fractional order beampattern is generated for the DMA, wherein a third DF value corresponding to the fractional order beampattern matches the target DF value and the fractional order beampattern comprises a first fractional contribution from the N order beampattern and a second fractional contribution from the N-1 order beampattern.
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Inventors:
CHEN JINGDONG (CN)
HUANG GONGPING (CN)
HUANG GONGPING (CN)
Application Number:
PCT/CN2019/078607
Publication Date:
September 24, 2020
Filing Date:
March 19, 2019
Export Citation:
Assignee:
UNIV NORTHWESTERN POLYTECHNICAL (CN)
International Classes:
H04R29/00
Domestic Patent References:
| WO2018087590A2 | 2018-05-17 |
Foreign References:
| CN103856866A | 2014-06-11 | |||
| EP3007461A1 | 2016-04-13 | |||
| CN104424953A | 2015-03-18 |
Other References:
HUANG， GUOPING ET AL.: "A flexible high directivity beamformer with spherical microphone arrays", THE JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, vol. 143, no. 5, 22 May 2018 (2018-05-22), XP012228692, ISSN: 0001-4966, DOI: 20191204175828X
Attorney, Agent or Firm:
PANAWELL & PARTNERS, LLC (CN)
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