Patent ID: 11875771
Assignee: AMS AG
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 16:
17. An audio system for an ear mountable playback device comprising
a speaker;
an error microphone configured to sense sound being output from the speaker and ambient sound;
a further microphone configured to predominantly sense ambient sound;
a first noise filter coupling the further microphone to the speaker;
a second noise filter coupling the error microphone to the speaker; and
an adaptation engine configured to
adapt a response of the first noise filter depending on error signals from at least the error microphone;
estimate a leakage condition from the response of the first noise filter; and
adapt a response of the second noise filter depending on the estimated leakage condition; and
wherein the adaptation engine is further configured to
compare a signal level of the further microphone to a signal level of the error microphone; and
based on the comparison of the signal levels evaluate an accuracy of the estimated leakage condition.