US 11,671,751 B2
Microphone array
Marios Athineos, San Francisco, CA (US); Eugen Rasumow, Wedemark (DE); Alexander Krüger, Burgdorf (DE); and Alexander Nowak, Hannover (DE)
Assigned to SENNHEISER ELECTRONIC GMBH & CO. KG, Wedemark (DE)
Filed by Sennheiser electronic GmbH & Co. KG, Wedemark (DE)
Filed on Apr. 28, 2021, as Appl. No. 17/242,556.
Prior Publication US 2022/0353608 A1, Nov. 3, 2022
Int. Cl. H04R 1/40 (2006.01); H04R 1/04 (2006.01); H04R 3/00 (2006.01); H04R 9/08 (2006.01); H04R 1/08 (2006.01); H04R 29/00 (2006.01); G10L 25/18 (2013.01); H04R 5/027 (2006.01); H04R 9/02 (2006.01)
CPC H04R 1/406 (2013.01) [H04R 1/04 (2013.01); H04R 3/005 (2013.01); G10L 25/18 (2013.01); H04R 1/08 (2013.01); H04R 5/027 (2013.01); H04R 9/025 (2013.01); H04R 9/08 (2013.01); H04R 29/004 (2013.01); H04R 2201/40 (2013.01); H04R 2203/12 (2013.01); H04R 2307/027 (2013.01); H04R 2430/20 (2013.01); H04S 2400/15 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A microphone array, comprising:
fifteen or twenty-one microphone capsules (K15,11-K15,35, K21,11-K21,37); and
a circuit arrangement, which is connected to the microphone capsules so as to receive microphone signals from the microphone capsules, and which is configured for processing the microphone signals together;
wherein the microphone capsules are arranged in a plane on a carrier,
characterized in that the microphone capsules are positioned on the carrier at the following positions:
on three identical branches, each having the same number of microphone capsules, wherein the branches are rotated against one another by 120° around a common center; and
wherein, in a planar isometric coordinate system with three axes rotated by 60° against each other and forming an isometric coordinate system of equilateral triangles, each of the microphone capsules lies on a corner of a triangle of the isometric coordinate system,
wherein the geometric center of the array is located in the middle of one of the triangles, which is the center triangle, and wherein positions within the isometric coordinate system are specified as multiples of the side lengths of the triangles in the format and relative to a reference point at that corner of the center triangle which lies opposite its side running parallel to one of the axes, and
wherein the microphone array comprises fifteen microphone capsules (K15,11-K15,35), which, starting from the reference point, are arranged at the following positions, or at the corresponding positions in a mirrored arrangement:
K15,11=(0,4,0), K15,12=(1,3,0), K15,13=(2,2,0), K15,14=(0,2,2), K15,15=(0,2,1),
K15,21=(0,0,−3), K15,22=(0,−1,−2), K15,23=(0,−2,−1), K15,24=(2,0,−1), K15,25=(1,0,−1), and
K15,31=(−3,0,1), K15,32=(−2,0,2), K15,33=(−1,0,3), K15,34=(−2,−1,0), K15,35=(−2,0,0).