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Related Experiment Videos

A real-time LPC-based vocal tract area display for voice development

D Rossiter1, D M Howard, M Downes

  • 1Department of Electronics, University of York, England.

Journal of Voice : Official Journal of the Voice Foundation
|December 1, 1994
PubMed
Summary

This study introduces a real-time graphical display for vocal tract area approximation during vowel articulation. The system uses acoustic signal analysis to aid articulatory development and training.

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Area of Science:

  • Speech Science
  • Acoustic Phonetics
  • Biomedical Engineering

Background:

  • Understanding vocal tract dynamics is crucial for speech production research.
  • Real-time visual feedback can enhance speech therapy and training.

Purpose of the Study:

  • To design and implement a system for real-time vocal tract area approximation.
  • To provide a graphical display of vocal tract shape during vowel articulation.
  • To create a tool for articulatory development and speech training.

Main Methods:

  • Digital sampling of the acoustic signal.
  • Linear predictive coding (LPC) to derive reflection coefficients.
  • Calculation of area coefficients to approximate vocal tract area.
  • Real-time graphical display generation (approx. 20 cycles/s).

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Main Results:

  • Successful real-time approximation and graphical display of vocal tract area.
  • Demonstration of system output for cardinal vowels and sung vowels.
  • Capability to record synchronized audio-visual sequences for training.

Conclusions:

  • The developed system offers a novel approach to visualizing vocal tract articulation.
  • The graphical display can serve as a dynamic target for improving speech articulation.
  • The system has potential applications in speech therapy, voice training, and phonetic research.