Earphone signal processing method and device and earphone

Abstract

The embodiment of the invention discloses an earphone signal processing method and device and an earphone. The earphone signal processing method comprises the following steps: detecting the motion state of an earphone wearer by using an acceleration sensor arranged in an earphone; detecting wind noise conditions of different frequency bands by using a first microphone and a second microphone which are arranged outside the earphone; according to the motion state of an earphone wearer and the wind noise conditions of different frequency bands, adjusting the working modes of a feed-forward filter and a feedback filter in the earphone, wherein the feed-forward filter and the feedback filter are used for active noise reduction of the earphone. According to the scheme provided by the embodiment of the invention, both the signal correlation of the two microphones and the signal energy of the microphones are considered when wind noise judgment is carried out in different frequency bands, so that the misjudgment of the wind noise can be effectively reduced, the adverse effect of the wind noise on the hearing feeling is avoided, and the safety problem caused by noise reduction in motion is reduced.

Description

technical field [0001] The invention relates to the technical field of earphone active noise reduction, in particular to an earphone signal processing method and device and an earphone. Background technique [0002] Earphones are more and more widely used in our daily life because of their small size and portability. In addition to using earphones to listen to music and watch videos, earphones also play a role in isolating noise and providing users with a quiet environment. The physical isolation of the earphones is limited to low-frequency noise, especially low-frequency noise. Therefore, active noise reduction is more and more widely used in headphones. [0003] The principle of active noise reduction is to generate a signal with a similar amplitude and opposite phase to the environmental noise to offset the influence of the environmental noise. However, most of the current active noise reduction technologies used in headphones are relatively simple, and few external fac...

AI Technical Summary

Problems solved by technology

However, most of the current active noise reduction technologies used in headphones are relatively simple, and few external factors are considered.

Even if there is a method to adaptively adjust the noise reduction level according to the level of environmental noise, the existing noise reduction algorithms often do not take into account the presence of wind noise and the situation when there is wind noise and the user is moving

[0004] For example, when a user is walking or running, they may be at a higher level of noise reduction, coupled with the physical isolation of the earphones from environmental noise, resulting in the inability to hear environmental noise, such as bicycles, or electric vehicles, or cars driving. Overcoming sounds or whistles can cause safety problems. Therefore, it is necessary to adjust the noise reduction frequency band according to whether the wearer of the headset is in a state of motion. While ensuring noise reduction, you can perceive useful noise from the outside world

[0005] In addition, because wind noise is a random signal without a fixed phase, if according to the existing noise reduction algorithm, after the feedforward microphone simply acquires the external sound signal and superimposes it in reverse, the wind noise may not be eliminated or even amplified. When there is a large wind noise, it will seriously affect the sense of hearing

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