The cochlear implant consists of two main parts: the implant and the in vitro machine. The implant portion is surgically placed into the temporal bone and inside the cochlea. The cochlear implant consists of a speech processor, a coil, and a coil lead. The cochlear implant works: The microphone on the speech processor picks up external sound, converts the sound signal into an electrical signal, and transmits it in the form of electromagnetic waves to the implant’s stimulation receiver, which in turn sends electrical impulses to the nerve tissue in the cochlea. These signals are then transmitted to the brain via the auditory nerve, where they form the sense of hearing.