Patent ID: 9014387
Filing Date: 2015-04-21
Classification: G10K,H04R

Abstract:
1. A personal audio system, comprising: a first earspeaker for reproducing a first audio signal including both first source audio for playback to a listener and a first anti-noise signal for countering the effects of ambient audio sounds in an acoustic output of the first earspeaker; a second earspeaker for reproducing a second audio signal including both second source audio for playback to a listener and a second anti-noise signal for countering the effects of ambient audio sounds in an acoustic output of the second earspeaker; at least one microphone for providing at least one microphone signal indicative of the ambient audio sounds; and a processing circuit that generates the first anti-noise signal from the at least one microphone signal using a first adaptive filter to reduce the presence of the ambient audio sounds at the first earspeaker in conformity with the at least one microphone signal, wherein the processing circuit generates the second anti-noise signal from the at least one microphone signal using a second adaptive filter to reduce the presence of the ambient audio sounds at the second earspeaker in conformity with the at least one microphone signal, wherein the processing circuit determines a first degree of coupling between the first earspeaker and an ear of the listener and determines a second degree of coupling between the second earspeaker and another ear of the listener, and wherein the processing circuit halts an update of coefficients of both the first adaptive filter and the second adaptive filter in response to detecting that the first degree of coupling indicates that the first earspeaker is loosely coupled to the ear of the listener or that the second degree of coupling indicates that the second earspeaker is loosely coupled to the other ear of the listener, while continuing to generate the first anti-noise signal and the second anti-noise signal.