A cochlear implant can hear at a minimum of about 25 decibels, which is roughly equivalent to normal human hearing.
A cochlear implant is a processor outside the body that converts sound into a certain form of coded electronic signal, which is passed through electrodes implanted in the body to excite the auditory nerve, so that the excitement is transmitted to the cerebral cortex to eventually form the sense of hearing.
The specific sound heard after cochlear implantation is related to the brand and personal feeling, there may be some changes in the sound tone, such as low sound, muffled situation. However, most cochlear implants are relatively sensitive, and with training, you can hear up to 25 decibels, which is the same as a normal person.
It is recommended to consult your local doctor for specific cochlear implantation related matters. A specialist should refer to the relevant standards after a systematic examination.