The external part of cochlear implants comprises –
- A microphone receiving surrounding environmental sounds.
- A speech processor filters received sounds and divides audible speech in different channels and sends out the electrical signal to –
- The transmitter by a thin cable.
There is a transmitter sending the coded signals to an implanted receiver just under the skin. This resembles a magnet, which can be attached and opened easily. The electrical signals obtained via speech processor are transferred to the internal part by electromagnetic induction.