What is cochlear implant? Experts explain that this kind of cochlear implant is an electronic device that can replace the function of human ear, which can assist hearing. Please listen to the experts' introduction.
It can help adults and children with severe and extremely severe hearing loss to recover or provide the sense of hearing and improve the ability to communicate with people. Cochlear implant is composed of electrodes and receptors implanted in human body, speech processor, directional microphone and transmitter carried outside human body.
Sound is received by directional microphone and converted into electrical signal, and then transmitted to speech processor. The signal is amplified and filtered, and then transmitted to the receiver by the transmitter, and then the electric pulse is generated and transmitted to the corresponding electrode to excite the auditory nerve fiber and transmit the sound information to the brain to generate hearing.
Because some patients with severe or extremely severe sense of hearing loss is more serious, the average hearing threshold of speech frequency is often more than 90 dB, even the amplified voice is difficult to hear, and the effect of wearing hearing aids is poor.
This is because of inner ear disease, drug poisoning or other reasons caused by inner ear sensory cell damage, seriously hindering the transmission of auditory information. Although the external amplified sound is natural and clear, the patient's central auditory system can not receive enough information. Cochlear implantation can bypass the damaged structure of the inner ear, directly stimulate the auditory nerve and make the patient regain hearing. [