ISCA Archive Interspeech 2005
ISCA Archive Interspeech 2005

The multiple-channel cochlear implant: interfacing electronic technology to human consciousness

Graeme M. Clark

Fundamental research on electrical stimulation of the auditory pathways resulted in the Multiple Channel Cochlear Implant, a device which provides understanding of speech to severely-toprofoundly deaf people. The device, a miniaturized receiverstimulator with multiple electrodes fed with power and speech data through two separate aerials was first implanted in a patient in 1978 as a prototype, and since 1982, was commercially produced by Cochlear Limited, Australia. Speech processing is based on the discovery that the sensation at each electrode is "vowel-like". Initially, the second formant was coded as a place of stimulation, the sound pressure was coded as a current level, and the voicing frequency as a pulse rate. Further research showed that there were progressively better open-set word and sentence scores for the extraction of the first formant in addition to the second formant (the F0/F1/F2 processor), the addition of high fixed filter outputs (MULTIPEAK) and then finally 6 to 8 maximal filter outputs at low rates (SPEAK) and high rates (ACE). All the frequencies were coded on a place basis. World trials completed for the US FDA on late-deafened adults in 1985 and in 1990 on children from two years to 17 years proved that a 22-channel cochlear implant was safe and effective in enabling them to understand speech both with and without lip-reading.


doi: 10.21437/Interspeech.2005-1

Cite as: Clark, G.M. (2005) The multiple-channel cochlear implant: interfacing electronic technology to human consciousness. Proc. Interspeech 2005, 1-4, doi: 10.21437/Interspeech.2005-1

@inproceedings{clark05_interspeech,
  author={Graeme M. Clark},
  title={{The multiple-channel cochlear implant: interfacing electronic technology to human consciousness}},
  year=2005,
  booktitle={Proc. Interspeech 2005},
  pages={1--4},
  doi={10.21437/Interspeech.2005-1}
}