Beam forming method and system of microphone voice signals of hearing aid device, and hearing aid device

Abstract

The invention belongs to the technical field of signal processing, and provides a beam forming method and system of microphone voice signals of a hearing aid device, and the hearing aid device. The invention aims at solving the following problems: spatial orientation information picked up by a double-microphone voice signal beam forming method used on the existing hearing aid device is limited, the spatial resolution is relatively low, and the number of formed pole figures is small, such that when the directional noise is serious, the beams cannot be controlled conveniently and flexibly to form proper pole figures. According to the beam forming method and system provided by the invention, double miniature microphones are used, each miniature microphone comprises two sound pipes with opposite directions in the space to pick up voice signals, thereby improving the spatial resolution of voice pickup and the spatial orientation information of voice. More importantly, weight parameters and adjustable inclination angle parameters of signals are processed, so that the number of the pole figures corresponding to the final output voice signals is greatly increased, convenient and flexible control is realized, proper pole figures are formed, and the speech recognition rate of a user of the hearing aid device is improved.

Description

technical field [0001] The invention belongs to the technical field of signal processing, and in particular relates to a voice signal beamforming method and system of a hearing aid device microphone and a hearing aid device. Background technique [0002] Users of hearing aids such as hearing aids and cochlear implants can basically communicate without barriers in a quiet environment, but in noisy environments, especially when the signal-to-noise ratio is low, the speech recognition rate of cochlear implant users is greatly reduced. Using a microphone array to improve the signal-to-noise ratio of the speech signal picked up by the front end of the hearing aid device is very important for improving the speech recognition rate of the hearing aid device user in a noisy environment, especially when the spatial positions of the speech signal source and the noise source are inconsistent. The method can effectively separate the voice signal and improve the signal-to-noise ratio of t...

AI Technical Summary

Problems solved by technology

[0005] A hearing aid device microphone voice signal beamforming method, system, and hearing aid device, aiming to solve the problem of limited spatial orientation information and low spatial resolution of speech picked up by the dual-microphone voice signal beamforming method used on existing hearing aid devices , and the number of polar patterns formed is small, which leads to the problem that it is very inconvenient to flexibly control the beam to form a suitable polar pattern when the directional noise is serious

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