Cochlear implant

Sounds and speech are detected by the microphone.
The information from the microphone is sent to the speech processor.
The speech processor analyses the information and converts it into an electrical code.
The coded signal travels via a cable to the transmitting coil in the headset. Radio waves from the transmitter coil carry the coded signal through the skin to the implant inside.
The implant package decodes the signal. The signal contains information that determines how much electrical current will be sent to the different electrodes.
The appropriate amount of electrical current passes down the appropriate lead wires to the chosen electrodes.
The position of the stimulating electrodes within the cochlea will determine the frequency or pitch of the sounds. The amount of electrical current will determine the loudness of the sounds.
Once the nerve endings in the cochlea are stimulated, the message is sent up to the brain along the hearing nerve. The brain can then try to interpret the stimulation as a meaningful sound.