US Patent 11445291 Noise-reducing earphone with adjustable voice

The application belongs to the field of earphone technology, and discloses a type of noise-reducing earphones with adjustable voice. An audio processor processes voice signals. After a digital signal processor (DSP) completes noise reduction, the signals return to the audio processor, where two signals are combined, through another signal wire. Then the signals are transmitted to a digital-to-analog converter (DAC) that transmits the signals to an acoustic amplifier, where the signals are transmitted to a speaker to realize the adjustment of voice.