Headphone Noise Reduction Method and Noise Reduction Headphones

Abstract

The present invention provides a noise reduction method of an earphone and a noise reduction earphone. The noise reduction method of the earphone comprises the steps that a calibration module drives a single horn to send out an original noise signal, and a noise reduction microphone receives the original noise signal and transmits the received original noise signal to the calibration module; the calibration module initializes parameters of the earphone according to the original noise signal transmitted by the noise reduction microphone, and generates a corresponding anti-noise signal, in addition, the calibration module drives the single horn to send out the original noise signal and the anti-noise signal; and the original noise signal and the anti-noise signal are offset, so as to form an error signal, the noise reduction microphone receives the error signal and transmits the error signal to the calibration module, and the calibration module determines a threshold of a noise reduction quantity of the error signal. Through adoption of the method, parameters of the noise reduction earphone can be calibrated automatically, and the noise reduction effect of the earphone is improved.

Description

technical field [0001] The present invention relates to the technical field of acoustics, and more specifically, to a noise reduction method for earphones and a noise reduction earphone using the method for noise reduction. Background technique [0002] With the wide application of portable electronic products such as high-quality smartphones and Pads, people have higher and higher requirements for the acoustic parameters of earphones that can be used with them. At present, the common noise-cancelling earphones on the market generally have noise-cancelling circuits designed in the earphones. above, the cost is higher. [0003] In addition, some products set the DSP noise reduction processing on the mobile phone end. The design of the earphone part only includes the MIC unit that picks up the surrounding noise and the speaker that replays the anti-phase noise. The feedforward noise reduction method is adopted, and the microphone unit uses ECM ( ElectretCapacitor Microphone, ...

AI Technical Summary

Problems solved by technology

[0004] In view of the above problems, the purpose of the present invention is to provide a noise reduction method for earphones and noise reduction earphones to solve the problems of poor consistency of sensitivity and phase between noise reduction microphones and speakers, and unsatisfactory noise reduction effects of earphones.

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