Cochlear Implants & Mapping

Rehabilitation Center also provide the services of Cochlear Implants & Mapping.

Programming of the cochlear implant, refers to the setting of the electrical stimulation limits necessary for the cochlear implant user to perceive soft and comfortably loud sound. Normal acoustic hearing can process sounds within a 120dB range.

Normal speech ranges anywhere between 40 and 60dB, Cochlear implant recipients have a dynamic range of only 6-15dB in electrical current. Therefore, in cochlear implant speech processors, a 120dB acoustic range must be compressed into an electric range of 6-15dB.

A cochlear implant user needs to have their MAP frequently updated. This is because each MAP is individual to its user and is constantly changing. Over time, MAPs may become weak, softer, or less clear. This is the result of several factors including adaptation and tissue growth.

Fibrous tissue continues to grow over the internally implanted device (electrodes and receiver) during the months following surgery. These changes may change the amount of electrical stimulation needed to stabilize the signal. The greater the tissue growth over the implant device, the more power is required to stimulate it.