Wireless Digital Hearing Aid System Based On Bluetooth Low Energy

With the development of low-power wireless technology and digital hearing aids,the application of low-power wireless technology to digital hearing aids has become a goal that the relevant researchers want to achieve.This paper aims to compare and analyze three low-power wireless technology,then proposed based on low-power Bluetooth wireless digital hearing aids system,and gives the overall design.The system includes wireless digital hearing aids and wireless microphones in which wireless digital hearing aids enable to control and receive low-power audio,and wireless microphones enable low-power audio transmission.In order to realize the function of the system,this paper chooses EZAIRO7150 SL digital signal processing chip as the master chip.To achieve the versatility of wireless digital hearing aids,this paper designed the volume adjustment,power display,and so on modules.Finally,through the analysis and decided to use Gazell protocol and G.722 protocol to achieve wireless digital hearing aids low-power audio receiver and wireless microphone low-power audio transmission.Compared with other hearing aids,this paper designed wireless digital hearing aids system based on Bluetooth low energy with ultra-low power,multi-functional,and so on.In order to verify the effect of the practical effect of the low power Bluetooth wireless hearing aid system designed in this paper,the functional and experimental experiments were carried out respectively.The experimental results verify that the system designed in this paper can achieve the desired goal.Functional tests of wireless digital hearing aids such as volume adjustment and power display have been successfully implemented.Within the indicator test of the power consumption,distance and stability of the hearing aid in different modes,BLE mode power consumption below 2mA,the stable connection distance is within 6 meters,the power consumption of low-power audio reception is 4.5mA,compared to other hearing aids reduced by 70%,extending the hearing aid use time.In the wireless microphone and wireless digital hearing aids under the common test,the best audio transmission distance is reaching 12 meters.In the electroacoustic test,the relevant parameters of the hearing aids meet the national technical requirements.