Abstract: An audio system configured to authenticate a user. The system detects, via a microphone array, airborne acoustic waves corresponding to a vocalization of a user. The system also detects, via a vibration measurement assembly, vibration of tissue of the user caused by the vocalization. The system generates an authentication dataset using the detected airborne acoustic waves and the detected vibration of tissue. The system may authenticate the user based in part on the authentication dataset.

Abstract: An audio system including an optical microphone and an audio controller. The optical microphone includes a light source and a detector. In some embodiments, the light source illuminates skin of a user. Alternatively the optical microphone also includes a membrane, and the light source illuminates a portion of the membrane. Sounds from a local area cause vibrations in the skin (or vibrations in the membrane). The detector may be in an interferometric configuration or a non-interferometric configuration with the light source. The audio controller monitors the vibrations of the skin (or membrane) using signal output from the detector, and measures the sounds using the monitored vibrations.