Patent ID: 11955133
Assignee: ANALOG DEVICES INTERNATIONAL UNLIMITED COMPANY
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 0:
1. An audio signal processing method implemented by an audio system which comprises at least two sensors which include an internal sensor and an external sensor, wherein the internal sensor is arranged to measure acoustic signals which reach the internal sensor by propagating internally to a head of a user of the audio system and the external sensor is arranged to measure acoustic signals which reach the external sensor by propagating externally to the user's head, wherein the audio signal processing method comprises:
producing a first audio signal and a second audio signal by measuring simultaneously acoustic signals reaching the internal sensor and acoustic signals reaching the external sensor, respectively,
filtering the second audio signal by a noise matching filter configured to match a second noise signal affecting the second audio signal with a first noise signal affecting the first audio signal, wherein the first noise signal and the second noise signal correspond to a same noise acoustic signal originating outside the user's head and measured by respectively the internal sensor and the external sensor, thereby producing a filtered second audio signal which includes a matched second noise signal,
mixing the filtered second audio signal and the first audio signal, thereby producing a denoised first audio signal, and
filtering the denoised first audio signal by a voice matching filter configured to match a first voice signal in the denoised first audio signal with a second voice signal in the second audio signal, wherein the first voice signal and the second voice signal correspond to a same voice acoustic signal emitted by the user, measured by respectively the internal sensor and the external sensor, thereby producing a filtered denoised first audio signal.