US 12,262,173 B2
Audio processing device and method for acoustic angle of arrival detection using audio signals of a virtual rotating microphone
Julio Cesar Zamora Esquivel, Sacramento, CA (US); Hector Cordourier Maruri, Guadalajara (MX); Jose Rodrigo Camacho Perez, Guadalajara (MX); Paulo Lopez Meyer, Zapopan (MX); Jose Torres Ortega, Zapopan (MX); and Alejandro Ibarra Von Borstel, Manchaca, TX (US)
Assigned to Intel Corporation, Santa Clara, CA (US)
Filed by Intel Corporation, Santa Clara, CA (US)
Filed on Oct. 25, 2021, as Appl. No. 17/509,573.
Prior Publication US 2022/0046355 A1, Feb. 10, 2022
Int. Cl. H04R 1/40 (2006.01); H04R 3/00 (2006.01)
CPC H04R 1/406 (2013.01) 25 Claims
OG exemplary drawing
 
1. A computer-implemented method of acoustic angle of arrival detection comprising:
receiving audio signals from a circular array of fixed microphones; and
determining an acoustic angle of arrival of the audio relative to the circular array comprising generating at least two frequency-related values each associated with microphones on an opposite side of a potential angle of arrival direction, and comparing the frequency-related values, wherein the generating comprises using signs of the audio signals without using magnitudes of the audio signals in computations to generate and compare the frequency-related values.