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Human speech development for an implantable artificial larynx.

C Painter1, T Kaiser, J M Fredrickson

  • 1Department of Otolaryngology, Washington University School of Medicine, St Louis.

The Annals of Otology, Rhinology, and Laryngology
|September 1, 1987
PubMed
Summary
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Researchers improved artificial larynx voice quality by analyzing listener preferences for specific sound waveforms. This led to identifying optimal acoustic characteristics for a new device version, enhancing communication for laryngectomee patients.

Area of Science:

  • Biomedical Engineering
  • Speech Science
  • Otolaryngology

Background:

  • Electromagnetic artificial larynx devices aid communication for individuals who have undergone laryngectomy.
  • Current devices provide functional speech but often lack natural voice quality.
  • Improving voice quality is crucial for enhanced patient communication and psychosocial well-being.

Purpose of the Study:

  • To identify preferred acoustic characteristics of artificial larynx voice for improved quality.
  • To guide the development of a new generation of artificial larynx devices.
  • To enhance speech intelligibility and naturalness for users.

Main Methods:

  • Listener judgments were collected for 22 different sound sources.
  • Electroglottograms were utilized as sound sources in a speech synthesizer.

Related Experiment Videos

  • Sentences with varying voice qualities were produced for subjective evaluation.

    • Main Results:

    • A distinct listener preference was observed for specific waveforms.
    • Preferred waveforms featured a long open phase and an abrupt closing gesture.
    • A very brief closed phase was also identified as desirable for optimal voice quality.

    Conclusions:

    • The identified acoustic characteristics provide a basis for designing improved artificial larynx devices.
    • Incorporating these findings will lead to enhanced voice quality and user satisfaction.
    • Future iterations of the artificial larynx can offer more natural and intelligible speech.