US 12,335,696 B2
Microphone device and audio signal processing method
Ming-Yu Liu, New Taipei (TW)
Assigned to AVER INFORMATION INC., New Taipei (TW)
Filed by AVER INFORMATION INC., New Taipei (TW)
Filed on Apr. 7, 2023, as Appl. No. 18/132,339.
Claims priority of application No. 111113386 (TW), filed on Apr. 8, 2022.
Prior Publication US 2023/0328431 A1, Oct. 12, 2023
Int. Cl. H04R 3/00 (2006.01); H04R 1/40 (2006.01); H04R 29/00 (2006.01)
CPC H04R 3/005 (2013.01) [H04R 1/406 (2013.01); H04R 29/005 (2013.01); H04R 2201/401 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A microphone device, comprising:
a first circuit board, having a reference point;
a plurality of first microphones, disposed on the first circuit board and arranged along a first spiral about the reference point; and
a plurality of second microphones, disposed on the first circuit board and arranged along a second spiral about the reference point, wherein the second spiral is non-overlapped with the first spiral;
wherein the plurality of first microphones and the plurality of second microphones are point-symmetrical with respect to the reference point, the plurality of first microphones and the plurality of second microphones form a plurality of microphone sets, and each of the plurality of microphone sets comprises one of the plurality of first microphones and one of the plurality of second microphones which are point-symmetrical with respect to the reference point.