US 12,143,783 B1
Sound source localization with reflection detection
Wai Chung Chu, San Jose, CA (US)
Assigned to Amazon Technologies, Inc., Seattle, WA (US)
Filed by Amazon Technologies, Inc., Seattle, WA (US)
Filed on Nov. 7, 2022, as Appl. No. 17/981,705.
Int. Cl. H04R 3/00 (2006.01); G10L 15/08 (2006.01); G10L 15/22 (2006.01); G10L 25/06 (2013.01); G10L 25/21 (2013.01); H04R 1/40 (2006.01)
CPC H04R 3/005 (2013.01) [G10L 15/08 (2013.01); G10L 15/22 (2013.01); G10L 25/06 (2013.01); G10L 25/21 (2013.01); H04R 1/406 (2013.01); G10L 2015/088 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A computer-implemented method, the method comprising:
receiving first audio data corresponding to a first microphone associated with a device, the first audio data including a first representation of an audible sound generated by a first sound source;
receiving second audio data corresponding to a second microphone associated with the device, the second audio data including a second representation of the audible sound;
determining first data representing a correlation between the first audio data and a delayed version of the first audio data;
determining second data representing a correlation between the first audio data and the second audio data;
determining third data using the first data and the second data, the third data representing a likelihood that the second data corresponds to direct arrival of the audible sound;
determining, using the second data, a first plurality of power values including a first value corresponding to a first direction relative to the device and a second value corresponding to a second direction relative to the device;
determining, using the third data, a second plurality of power values including a third value corresponding to the first direction and a fourth value corresponding to the second direction; and
determining, using the first plurality of power values and the second plurality of power values, that the first sound source is associated with the first direction.