公开(公告)号：US11284184B2

公开(公告)日：2022-03-22

申请号：US17265485

申请日：2019-07-29

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Matthew Conrad Fellers ,  Louis D. Fielder ,  Douglas Walter Hansen ,  Joshua B. Lando ,  C. Phillip Brown ,  Rhonda J. Wilson

IPC: G10K11/178 ,  H04R1/10 ,  H04R29/00

Abstract: A method of calibrating a feedback-based noise cancellation system of an ear device may involve obtaining a measured plant response of the ear device, obtaining a reference plant response value and determining a plant response variation between the reference plant response value and a value corresponding to the measured plant response. The method may involve obtaining a measured a coupler response of the ear device, obtaining a reference coupler response value and determining a coupler response variation between the reference coupler response value and a value corresponding to the measured coupler response. The method may involve determining, based at least in part on the plant response variation and the coupler response variation, a microphone signal gain correction factor and applying the microphone signal gain correction factor to ear device microphone signals that are input to a feedback loop of the feedback-based noise cancellation system.