公开(公告)号：US20230048401A1

公开(公告)日：2023-02-16

申请号：US17848802

申请日：2022-06-24

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： William E. SHERWOOD ,  Cedric ANDRIEU ,  Ghassan MAALOULI ,  Khaled LAKHDHAR

IPC: H04R29/00

Abstract: A method in a biometric authentication system, generating an acoustic stimulus for application to a user’s ear; receiving an audio signal representing a response of the user’s ear canal to the acoustic stimulus; adapting an ear canal response estimate of the user’s ear canal to the acoustic stimulus to reduce an error between the audio signal and the ear canal response estimate; calculating one or more quality metrics, the quality metrics comprising one or more of: an ear canal response estimate quality metric comprising one or more energy characteristics of the ear canal response estimate; an error quality metric derived from the error; an audio response quality metric comprising one or more statistical characteristics of the audio signal; and determining a validity of the audio signal for use in a biometric process based on the quality metrics.