EP 2773131 A1 20140903 - Spherical microphone array
Title (en)
Spherical microphone array
Title (de)
Kugelförmiges Mikrofonarray
Title (fr)
Antenne microphonique sphérique
Publication
Application
Priority
EP 13156983 A 20130227
Abstract (en)
A spherical microphone array with improved frequency range for use in a modal beamformer system is disclosed that comprises a sound-diffracting structure, e.g. a rigid sphere with cavities in the perimeter of the diffracting structure and a microphone located in or at the ends of said cavities respecitively, where the cavities are shaped to form both a spatial low-pass filter, e.g. exhibiting a wide opening, and a concave focusing element so that sound entering the cavities in a direction perpendicular to the perimeter of the diffracting structure converges to the microphones, e.g. by providing a parabolic surface, in order to minimize spatial aliasing.
IPC 8 full level
H04R 1/40 (2006.01)
CPC (source: EP)
H04R 1/406 (2013.01); H04R 2201/401 (2013.01)
Citation (applicant)
- US 2007110257 A1 20070517 - DEDIEU STEPHANIE [CA], et al
- NICOLAS EPAIN AND JEROME DANIEL: "Improving Spherical Microphone Arrays", 124TH CONVENTION OF THE AUDIO ENGINEERING SOCIETY,, 17 May 2008 (2008-05-17) - 20 May 2008 (2008-05-20)
Citation (search report)
- [XD] US 7840013 B2 20101123 - DEDIEU STEPHANIE [CA], et al
- [A] US 2004114778 A1 20040617 - GOBELI GARTH W [US], et al
- [XDYI] DANIEL JEROME ET AL: "Improving Spherical Microphone Arrays", AES CONVENTION 124; MAY 2008, AES, 60 EAST 42ND STREET, ROOM 2520 NEW YORK 10165-2520, USA, 1 May 2008 (2008-05-01), XP040508695
- [YA] RAFAELY B: "Analysis and Design of Spherical Microphone Arrays", IEEE TRANSACTIONS ON SPEECH AND AUDIO PROCESSING, IEEE SERVICE CENTER, NEW YORK, NY, US, vol. 13, no. 1, 1 January 2005 (2005-01-01), pages 135 - 143, XP011123592, ISSN: 1063-6676, DOI: 10.1109/TSA.2004.839244
- [A] THUSHARA D ABHAYAPALA ET AL: "Theory and design of high order sound field microphones using spherical microphone array", 2002 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING. PROCEEDINGS. (ICASSP). ORLANDO, FL, MAY 13 - 17, 2002; [IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING (ICASSP)], NEW YORK, NY : IEEE, US, 13 May 2002 (2002-05-13), pages II - 1949, XP032015185, ISBN: 978-0-7803-7402-7, DOI: 10.1109/ICASSP.2002.5745011
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
DOCDB simple family (application)
EP 13156983 A 20130227