Patent ID: 11961502
Assignee: BOSE CORPORATION
Field: Other consumer goods (Other fields)
Classification: CPC G  H | IPC G  H

Claim 0:
1. A method of controlling feedback instability in a wearable audio device with an active noise reduction (ANR) system, the method comprising:
determining a current feedback instability by combining outputs from multiple instability detectors,
applying latch logic to the current feedback instability to determine a current mitigation value, wherein applying the latch logic comprises:
applying a baseline mitigation value associated with a baseline instability as the current mitigation value, and
modifying the current mitigation value in response to determining that the current feedback instability exceeds the baseline instability as controlled by a latch mechanism, wherein modifying the current mitigation value is performed by:
comparing the current instability with the baseline instability,
if the current instability does not exceed the baseline instability:
controlling the baseline mitigation value based on satisfying an unlatch timer, and

if the current instability exceeds the baseline instability:
selecting the current instability as the current mitigation value, and
controlling the baseline mitigation value based on satisfying a latch timer, and

adjusting a driver command signal based on the current mitigation value to mitigate feedback instability.