Design of Auxiliary Hearing Compensation System Based on Bluetooth for Deaf Children

this paper studies a kind of hearing aid device based on Bluetooth technology and single chip microcomputer. According to the degree of hearing loss of hearing-impaired children, appropriate gain is selected to realize sound amplification, so that children with hearing impairment can hear the outside sound clearly and provide convenience for their life. This design adopts the design idea of the host and slave, the audio amplification parameters in the host are wireless transmitted to the slave through Bluetooth technology, and the audio code coding chip is given instructions. By selecting the appropriate audio signal amplification gain, the audio signal is amplified and processed, so that the hearing-impaired children can hear the external sound clearly. In this design scheme, the system hardware module design mainly includes the system control module, audio module, power module, Bluetooth communication module, etc., among which the audio module also includes the microphone input signal conditioning circuit, audio codec circuit, audio interface circuit, etc. The software platform uses the STM32F103xx firmware library provided by STMicroelectronics Company, and uses the library function provided by it and the corresponding instance to modify and debug.