US 12,487,356 B1
Method for wall direction estimation
Wai Chung Chu, San Jose, CA (US); Trausti Thor Kristjansson, San Jose, CA (US); and Carlo Murgia, Santa Clara, CA (US)
Assigned to Amazon Technologies, Inc., Seattle, WA (US)
Filed by Amazon Technologies, Inc., Seattle, WA (US)
Filed on May 4, 2023, as Appl. No. 18/143,305.
Int. Cl. G01S 15/46 (2006.01); G01S 15/00 (2020.01); H04R 1/40 (2006.01); H04R 3/00 (2006.01)
CPC G01S 15/46 (2013.01) [G01S 15/003 (2013.01); H04R 1/406 (2013.01); H04R 3/005 (2013.01); H04R 2201/401 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A computer-implemented method, the method comprising:
receiving first audio data including a first representation of an audible sound as detected by a first microphone of a device, the audible sound generated by a sound source and reflected off of an acoustically reflective surface;
receiving second audio data including a second representation of the audible sound as detected by a second microphone of the device;
determining first data representing a first correlation between the first audio data and a delayed version of the first audio data;
determining second data representing a second correlation between the second audio data and a delayed version of the second audio data;
determining, using the first data, a first value corresponding to a first peak represented in the first data, the first peak corresponding to the first representation of the audible sound;
determining, using the second data, a second value corresponding to a second peak represented in the second data, the second peak corresponding to the second representation of the audible sound; and
determining, using the first value and the second value, that a first azimuth value corresponds to the acoustically reflective surface.