Patent ID: 11956590
Assignee: nan
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 7:
8. A method for constructing a fractional order beamformer, for a differential microphone array (DMA) including a number M of microphones, the method comprising:
specifying, by a processing device, a target white noise gain (WNG) value for the DMA;
generating, by the processing device, an N+1 order beampattern and N+1 order beamformer for the DMA, wherein N is an integer value and a first WNG value corresponding to the N+1 order beamformer is smaller than the target WNG value;
generating, by the processing device, an N order beampattern and N order beamformer for the DMA, wherein a second WNG value corresponding to the N order beamformer is greater than the target WNG value; and
generating, by the processing device, a fractional order beampattern and the fractional order beamformer for the DMA, wherein a third WNG value corresponding to the fractional order beamformer matches the target WNG value and the fractional order beampattern comprises a first fractional contribution from the N+1 order beampattern and a second fractional contribution from the N order beampattern.