Question

1. Briefly describe three different sound processing schemes used to modify received sound signals before they are sent to a cochlear implant.

Answer 1

A cochlear implant is actually consist of two parts, such as an external piece which is usually a device hanging at the rear of the ear lobe that captures sound and operates it into electrical stimulation patterns that are then sent via radiofrequency transmission to an internal receiver. Implanted in the patient's fleeting bone, the recipient sends current pulses to the corresponding electrodes, which are mounted in a cluster on a thin, adaptable silicone tube implanted into the cochlea.

Signal processing in brief:
A sound signal, here the sound "sa," is grabbed by a microphone and sent to a implanted cochlear speech processor.
1.The processor digitizes the signal and filters it into a several frequency bands (commonly 12 to 22, however just 4 are appeared) that cover the speech spectrum, normally 200– 8000 Hz.
2. It at that point extricates the quick envelope of each filtered signal and uses that data to modulate the amplitude of a few interleaved pulses prepares that an interior collector conveys to a array of electrodes in the cochlea.
3. Higher-frequency bands are related with electrodes closer to the base of the cochlea to emulate the frequency to-put mapping that happens in typical hearing.

The description of three different sound processing schemes used to modify received sound signals before they are sent to a cochlear implant is shown in the below figure.