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Related Experiment Videos

Wearable digital speech processor for cochlear implants using a TMS320C25.

N Dillier1, C Senn, T Schlatter

  • 1Department of Otorhinolaryngology, University Hospital, Zürich, Switzerland.

Acta Oto-Laryngologica. Supplementum
|January 1, 1990
PubMed
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A new battery-operated sound processor was developed for the Nucleus-22 cochlear implant (CI), enabling advanced signal processing and noise reduction for improved hearing aid functionality.

Area of Science:

  • Biomedical Engineering
  • Signal Processing
  • Auditory Neuroscience

Background:

  • Cochlear implants (CIs) require sophisticated sound processing for effective auditory rehabilitation.
  • Existing CI sound processors have limitations in programmability and processing capabilities.

Purpose of the Study:

  • To develop a programmable, battery-operated sound processor for the Nucleus-22 cochlear implant (CI).
  • To enable advanced signal processing strategies and adaptive noise reduction.
  • To provide a flexible platform for research and clinical applications.

Main Methods:

  • Utilized a single-chip Digital Signal Processor (DSP) (TMS320C25).
  • Integrated a digital encoder interface for the Nucleus-22 CI.
  • Implemented various signal processing algorithms (vocoder, filterbank, zero crossings).

Related Experiment Videos

  • Incorporated adaptive noise reduction techniques.
  • Stored programs and parameters in electrically erasable memory for updates via a host computer.

    • Main Results:

    • Achieved quasi-simultaneous addressing of up to 10 electrodes at a 300 Hz repetition rate.
    • Demonstrated the capability to implement diverse sound processing strategies.
    • Enabled sophisticated adaptive noise reduction.
    • Processor power consumption is approximately 1 Watt, allowing for 11 hours of battery life.

    Conclusions:

    • The developed sound processor offers a flexible and advanced platform for cochlear implant users.
    • It supports a wide range of signal processing strategies and noise reduction techniques.
    • The device facilitates customization and updates, enhancing its utility in clinical and research settings.