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Related Experiment Videos

MINIMAC: a totally numeric 15 channel implanted stimulator.

C H Chouard1, J L Weber

  • 1Centre Hospitalo-Universitaye Paris-Saint-Antoine, France.

Pacing and Clinical Electrophysiology : PACE
|April 1, 1989
PubMed
Summary
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A new multichannel cochlear implant uses digital signal processing for improved performance and miniaturization. This advanced system offers greater programming flexibility and compatibility with older devices.

Area of Science:

  • Biomedical Engineering
  • Otorhinolaryngology
  • Digital Signal Processing

Background:

  • Previous multichannel cochlear implant systems include CHORIMAC-8 and CHORIMAC-12.
  • Advancements in digital signal processing enable new functionalities in cochlear implants.

Purpose of the Study:

  • To introduce a novel multichannel cochlear implant with fully digital sound signal processing.
  • To highlight the advantages of this new digital system over previous models.

Main Methods:

  • Utilizing Fast Fourier Transform (FFT) to divide speech information into 15 channels.
  • Sequential transmission of processed signals to an implanted receiver and electrode array.
  • Digital processing for signal analysis and transmission.

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Main Results:

  • Achieved miniaturization of the external transmitter and internal receiver.
  • Ensured compatibility of the new emitter with 12-channel receivers.
  • Increased the number of stimulating electrodes from 12 to 15.
  • Enabled simple emitter programming via an IBM-PC.
  • Provided options for postoperative programming of filter parameters and electrode amplification.

Conclusions:

  • The new digital multichannel cochlear implant offers significant advantages in size, compatibility, and programmability.
  • Future iterations will incorporate constant current, individual electrode current programming, and extra-cochlear electrode carriers for deeper implantation.