Cochlear Implant Characteristics: A Review of Current Technology

Acoustic Analysis of the Voice in Pediatric Cochlear Implant Recipients: A Longitudinal Study

“…The cochlear implant is a neuroprosthetic device that is used to provide auditory sensation to individuals with severe to profound deafness 1 . The cochlear implant converts sound energy to electrical energy, which then stimulates the auditory nerve with coded electrical impulses 2 . The device does not restore normal hearing but does provide critical auditory feedback cues in timing, intensity, and frequency domains 3 .…”

“…1 The cochlear implant converts sound energy to electrical energy, which then stimulates the auditory nerve with coded electrical impulses. 2 The device does not restore normal hearing but does provide critical auditory feedback cues in timing, intensity, and frequency domains. 3 The importance of this form of feedback to voice production was exemplified in a case report that described an abnormal elevation in speaking fundamental frequency in a postlingually deafened child 1 day after failure of her cochlear implant.…”

Some effects of cochlear implant use on loudness modulation

“…One type employs a feature extraction approach which provides "pulse trains" (pulsatile stimuli) that vary in rate, width, and amplitude to correspond to various features of the input signal (Mecklenburg & Brimacombe, 1985;Pfingst, 1985;Staller, 1985). Only the features deemed important·in speech perception are extracted and coded.…”

“…This strategy uses analog waveforms (direct electrical representation) of the speech signal that have been filtered, compressed, and adjusted in relative amplitude (Pfingst, 1985;Staller, 1985).…”

“…The electrode array in the various designs can be either one channel of information or several channels delivered separately to different electrodes (Staller, 1985). In many instances the electrode is placed into the cochlea or an extra-cochlear electrode can be placed at the round window.…”