Earphone noise reduction method, device and system and wireless earphone

Abstract

The invention discloses an earphone noise reduction method, device and system, and a wireless earphone. The method comprises the steps: obtaining an external environment signal collected by a feed-forward microphone and a loudspeaker playing signal collected by a feed-back microphone; wherein the external environment signal comprises an external noise signal and a horn leakage signal; obtaining anoffset signal corresponding to the horn leakage signal according to the horn playing signal; calculating the difference between the external environment signal and the offset signal to obtain a target signal; according to the target signal, noise reduction is carried out on loudspeaker playing of the earphone. According to the invention, a horn playing signal collected by the feedback microphoneis used as a reference signal. According to the invention, the horn leakage signal in the external environment signal collected by the feed-forward microphone is counteracted, so that the problems ofunstable noise reduction performance and howling caused by leakage of the sound signal played by the horn into the feed-forward microphone are inhibited, the noise reduction performance and stabilityof the earphone are improved, and the user experience is improved.

Description

technical field [0001] The present invention relates to the technical field of portable listening devices, in particular to a noise reduction method, device, system and wireless earphone for earphones. Background technique [0002] With the improvement of people's requirements for call quality, noise-canceling earphones have been widely used. Such as figure 1 The mixed noise reduction mode of feed-forward and feed-back shown has become the mainstream of current noise-canceling headphones. [0003] Feedforward noise reduction requires a high degree of isolation between the acoustic signal of the speaker (that is, the loudspeaker) and the feedforward microphone, and it is necessary to avoid the leakage of the acoustic signal of the speaker into the feedforward microphone as much as possible, otherwise it will cause problems such as figure 1 The closed-loop system shown, that is, the input, the system function G and the filter H form a feedback system through the action of th...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, in actual products, especially small earplugs or headphones with a smaller size, such as figure 1 As shown, the feed-forward microphone is difficult to achieve complete acoustic isolation from the speaker, which makes the feed-forward noise reduction performance unstable and prone to howling, which affects the noise reduction performance of the headset, and even seriously affects the normal use of the headset.

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