Microphone array noise reduction method and device of earphone, earphone and TWS earphone

Abstract

The invention discloses a microphone array noise reduction method and device of an earphone, an earphone and a TWS earphone, and the method comprises the steps: obtaining a first sound signal collected by a bone conduction microphone arranged on the earphone and a second sound signal collected by a preset number of microphones when a wearer of the earphone speaks; according to the first sound signal and the second sound signal, determining the delay time of the voice signal arriving at each microphone and arriving at the bone conduction microphone; according to the delay time, calculating thepointing angle between the microphone array composed of the microphones and the mouth of the wearer; adjusting the beam pointing angle of the microphone array according to the pointing angle, so as toperform beam forming of the microphone array by using the adjusted beam pointing angle. The bone conduction microphones are used for determining the time delay of each microphone in the microphone array for receiving the voice signals relative to the bone conduction microphones, so that the beam pointing angle of the microphone array is adaptively adjusted, the noise reduction effect of the microphone array is ensured, and the user experience is improved.

Description

technical field [0001] The invention relates to the technical field of portable listening devices, in particular to a microphone array noise reduction method and device for an earphone, an earphone and a TWS earphone. Background technique [0002] With the development of science and technology in modern society, people are using earphones more and more widely. In order to ensure the call quality when the user wears the headset, multiple microphones are often set in the headset to form a microphone array, and the microphone array is used to perform beamforming to reduce the noise of the collected sound signals. [0003] In the prior art, when using a microphone array for beamforming, a fixed beam pointing angle is often used. For example, when two microphones form a dual-microphone array for beamforming, it is considered that the position of each microphone and the mouth is fixed, and the distance between the two microphones is fixed. The distance L is fixed, and the beamfor...

AI Technical Summary

Problems solved by technology

However, when the user actually uses the headset, the direction of the microphone array will not ideally point to the user's mouth. Because different users have different habits of wearing headphones, the position of the microphone will change, making the direction of the microphone array There is a deviation from the mouth, and in extreme cases, users may wear the earphones backwards to talk, resulting in poor call quality

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