Microphone array noise reduction method and device for earphone, earphone and tws earphone

Abstract

The invention discloses a microphone array noise reduction method and device for an earphone, an earphone and a TWS earphone. The method includes: when the wearer of the earphone speaks, acquire the first sound signal collected by the bone conduction microphone set on the earphone and the preset number The second sound signal collected by each of the microphones; according to the first sound signal and the second sound signal, determine the delay time for the voice signal to reach each microphone and the bone conduction microphone; according to the delay time, calculate the microphone array composed of the microphone and The pointing angle of the wearer's mouth; according to the pointing angle, adjust the beam pointing angle of the microphone array, so as to utilize the adjusted beam pointing angle to carry out the beam forming of the microphone array; the present invention utilizes a bone conduction microphone to determine the relative The bone conduction microphone receives the time delay of the voice signal, so as to adaptively adjust the beam pointing angle of the microphone array, ensure the noise reduction effect of the microphone array, and improve the user experience.

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

Images