Design And Implementation Of Wireless Digital Hearing Aids Based On 2.4GHz Wireless Technology

The hearing-impaired is a special group,In the current rapid development of mobile internet background,researching wireless digital hearing aid which is based on 2.4GHz,it has important social significance and considerable market prospect for hearing-impaired to develop and promote high quality hearing aids and design high performance,compact,durable digital hearing aid.Based on the analysis of the development requirements of wireless digital hearing aid,this paper presents a design of a wireless digital hearing aid system,which is composed of a hearing aid and an ultra-low power consumption chip which is suitable for the wireless digital group.We choose an ultra-low power chip nRF24L01,which is based on 2.4GHz wireless technology and applied to wireless digital hearing aids to achieve the design of wireless digital hearing aids.On the hardware layout,Pegasus Coyote DSP 4.5 chip combined with 2.4GHz wireless technology research the wireless digital hearing aid,A new wireless digital hearing aid circuit and acoustic structure are designed to meet the requirements of 2.4GHz wireless digital hearing aid on acoustic space and anti-electromagnetic interference,so the new hearing aids can be connected through the relay equipment and audio equipment and intelligent mobile phone,It makes users not only hear real outside sounds,but also enjoy high fidelity music,and integrate perfectly with the surrounding electronic world.This paper completed the design of wireless digital hearing aid,the test results show that the system realizes the main requirements of the design objectives,The test result compliance with electro acoustic standards:the equivalent input noise is less than 32dB,the total harmonic distortion is less than 10%,the working current is less than or equal to 3mA,the wireless signal strength is more than-45dBm,the wireless connection effective distance is greater than or equal to 10m.