US 11,721,313 B2
Narrowband cancellation
Yashar Motedayen Aval, Bedford, MA (US); and Siamak Farahbakhsh, Waltham, MA (US)
Assigned to Bose Corporation, Framingham, MA (US)
Filed by Bose Corporation, Framingham, MA (US)
Filed on Feb. 25, 2021, as Appl. No. 17/185,435.
Claims priority of provisional application 62/981,315, filed on Feb. 25, 2020.
Prior Publication US 2021/0264891 A1, Aug. 26, 2021
Int. Cl. G10K 11/178 (2006.01)
CPC G10K 11/17823 (2018.01) [G10K 11/17873 (2018.01); G10K 2210/1282 (2013.01); G10K 2210/3011 (2013.01); G10K 2210/3027 (2013.01); G10K 2210/3044 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of reducing noise comprising:
receiving a sensor signal from a sensor in a cancellation zone;
estimating a signal representative of noise in the cancellation zone based at least in part upon the sensor signal;
identifying a frequency within the estimated signal to be reduced in the cancellation zone;
down converting the sensor signal to place the identified frequency at baseband;
down converting a speaker command signal to place the identified frequency at baseband;
generating a baseband estimated ear signal based upon the down converted sensor signal and the down converted speaker command signal;
generating a baseband anti-noise signal from the baseband estimated ear signal;
up converting the baseband anti-noise signal to the identified frequency to produce an anti-noise signal having components at the identified frequency; and
providing the anti-noise signal to be transduced into an acoustic signal.