Headphone noise reduction method, device, system and wireless headset

Abstract

The invention discloses an earphone noise reduction method, device, system and wireless earphone. The method includes: obtaining an external environment signal collected by a feed-forward microphone and a speaker playback signal collected by a feed-back microphone; wherein the external environment signal includes an external noise signal and the speaker leakage signal; according to the speaker playback signal, obtain the offset signal corresponding to the speaker leakage signal; calculate the difference between the external environment signal and the offset signal, and obtain the target signal; according to the target signal, noise reduction is performed on the speaker playback of the earphone; The speaker playback signal collected by the feed-forward microphone is used as a reference signal to offset the speaker leakage signal in the external environment signal collected by the feed-forward microphone, thereby suppressing the unstable noise reduction performance caused by the leakage of the acoustic signal played by the speaker into the feed-forward microphone. The howling problem has improved the noise reduction performance and stability of the headset, and improved the user experience.

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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