US 12,192,705 B2
Hearing device with feedback instability detector that changes an adaptive filter
Wenyu Jin, Eden Prairie, MN (US); and Ivo Merks, Eden Prairie, MN (US)
Assigned to STARKEY LABORATORIES, INC., Eden Prairie, MN (US)
Appl. No. 17/912,915
Filed by STARKEY LABORATORIES, INC., Eden Prairie, MN (US)
PCT Filed Apr. 6, 2021, PCT No. PCT/US2021/025886
§ 371(c)(1), (2) Date Sep. 20, 2022,
PCT Pub. No. WO2021/207134, PCT Pub. Date Oct. 14, 2021.
Claims priority of provisional application 63/007,617, filed on Apr. 9, 2020.
Prior Publication US 2023/0143347 A1, May 11, 2023
Int. Cl. H04R 25/00 (2006.01); G10K 11/178 (2006.01)
CPC H04R 25/453 (2013.01) [G10K 11/17817 (2018.01); G10K 11/17825 (2018.01); H04R 25/507 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An ear-wearable device, comprising:
an input sensor that provides an input signal, the input signal being digitized via circuitry of the ear-wearable device;
an adaptive feedback canceller comprising an adaptive foreground filter that inserts a feedback cancellation signal into the digitized input signal to produce an error signal; and
an instability detector configured to extract two or more features from the error signal, the instability detector comprising a machine learning module that determines an instability in the error signal based on the two or more features, the instability in the error signal being due to at least one of: a sudden change in a feedback path of the ear-wearable device, or a transition between stationarity periods of the input signal leading to outliers in the error signal;
the instability detector changing a step size of the adaptive foreground filter in response to determining the instability, the changed step size causing the adaptive foreground filter to have a faster adaptation to perturbations in the error signal compared to a previously used step size.