Patent ID: 11882397
Assignee: WEIFANG GOERTEK MICROELECTRONICS CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A noise reduction method for a microphone array of an earphone to be worn by a wearer, comprising:
acquiring, when the wearer of the earphone speaks, a first sound signal collected by a bone conduction microphone arranged on the earphone and second sound signals collected by two or more microphones arranged on the earphone, wherein the first sound signal comprises a voice signal, and the second sound signal comprises the voice signal and a noise signal;
determining, according to the first sound signal and the second sound signal, a delay time between a time when the voice signal arrives at each microphone to a time when the voice signal arrives at the bone conduction microphone;
computing, according to the delay time, a pointing angle of the microphone array formed by the microphones relative to a mouth of the wearer; and
adjusting a beam pointing angle of the microphone array according to the pointing angle, such that the microphone array forms a beam by an adjusted beam pointing angle.