US Patent 11302298 Signal processing method and device for earphone, and earphone

A signal processing method for an earphone includes: a motion state of a wearer of the earphone is detected by using an acceleration sensor arranged inside the earphone; a first microphone and a second microphone both arranged outside the earphone detect wind noise conditions corresponding to different frequency bands; and according to the motion state of the wearer of the earphone and the wind noise conditions corresponding to different frequency bands, operating modes of a feedforward filter and a feedback filter inside the earphone are adjusted, herein the feedforward filter and the feedback filter are configured for active noise cancellation of the earphone.