US 11,934,737 B2
Smart background noise estimator
Jae Lee, Palo Alto, CA (US); and Manas Maheshwari, San Jose, CA (US)
Assigned to Google LLC, Mountain View, CA (US)
Appl. No. 17/282,234
Filed by Google LLC, Mountain View, CA (US)
PCT Filed Jun. 23, 2020, PCT No. PCT/US2020/039104
§ 371(c)(1), (2) Date Apr. 1, 2021,
PCT Pub. No. WO2021/262151, PCT Pub. Date Dec. 30, 2021.
Prior Publication US 2022/0035593 A1, Feb. 3, 2022
Int. Cl. G06F 3/16 (2006.01); H04R 1/10 (2006.01)
CPC G06F 3/165 (2013.01) [H04R 1/1041 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A device, comprising:
one or more microphones; and
one or more processors in communication with the one or more microphones, the one or more processors being configured to determine a state of the device and, respondent to the determined state of the device being an active state:
determine a background noise level;
smooth the determined background noise level by applying a weight factor to the determined background noise level;
calculate, based on the smoothed noise level, a volume gain;
compare the calculated volume gain to a threshold gain; and
apply the calculated volume gain to increase or decrease a playback volume of the device when the calculated volume gain is less than the threshold gain.