公开(公告)号：US20200312295A1

公开(公告)日：2020-10-01

申请号：US16894207

申请日：2020-06-05

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： K. Joshua BODON ,  Jon D. HENDRIX ,  Brian THORNOCK ,  Aaron TREPTOW ,  Shahram TADAYON

IPC: G10K11/178 ,  H04R1/10

Abstract: A method may include receiving a user trigger signal indicating a user desire to update characteristics of an adaptive filter, receiving an error microphone signal indicative of the output of the transducer and the ambient audio sounds at the transducer, wherein the transducer reproduces both a source audio signal for playback to a listener and an anti-noise signal for countering the effects of ambient audio sounds in an acoustic output of the transducer, implementing the adaptive filter having a response that generates the anti-noise signal to reduce the presence of the ambient audio sounds in the error microphone signal, determining an acoustic coupling of the transducer to an error microphone for producing the error microphone signal, and responsive to a change in the acoustic coupling, prompting a user to assert the user trigger signal to indicate user desire to update characteristics of the adaptive filter.