Patent ID: 11922917
Assignee: AMS AG
Field: Other consumer goods (Other fields)
Classification: CPC G  H | IPC G  H

Claim 0:
1. An audio system for an ear mountable playback device comprising
a speaker configured to generate a speaker signal on the basis of an audio output signal;
an error microphone configured to generate a disturbed audio signal on the basis of ambient noise and the speaker signal;
a further microphone configured to generate a noise signal on the basis of the ambient noise;
a first noise filter configured to
generate a first compensation signal by applying filter operations to the noise signal; and
be adapted based on a compensated error signal;
a first mixer configured to generate the audio output signal by superimposing an audio signal, the first compensation signal and a second compensation signal;
a compensation filter configured to
generate a third compensation signal by applying filter operations to the audio signal; and
be adapted based on an acoustic leakage condition;
a second noise filter configured to generate the second compensation signal by applying filter operations to an intermediate compensation signal that is generated by subtracting the third compensation signal from the disturbed audio signal;
an error compensation unit configured to generate the compensated error signal on the basis of the disturbed audio signal and the third compensation signal; and
a detection unit configured to estimate the acoustic leakage condition on the basis of the first noise filter or of the disturbed audio signal and the audio output signal, wherein
for generating the compensated error signal, an adjustable gain is applied to the third compensation signal; and
for generating the intermediate compensation signal, the adjustable gain is not applied to the third compensation signal.