Noise reduction method and device for wireless earphone

The invention discloses a noise reduction method and device for a wireless earphone. The method comprises the following steps: acquiring a first frequency spectrum corresponding to a first recorded audio obtained when the wireless earphone plays a preset audio in a preset environment; obtaining a second frequency spectrum corresponding to a second recorded audio obtained by playing the preset audio by the wireless earphone in a preset light environment; determining a filter coefficient corresponding to a band-pass filter for adjusting the wireless earphone according to the first frequency spectrum and the second frequency spectrum; and noise reduction of the wireless earphone in a preset illumination environment is carried out by using the filter coefficient. According to the invention, the noise of the wireless earphone under photoelectric interference is reduced, and the complexity of the structure design of the wireless earphone for reducing the photoelectric noise is reduced.