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The "Overdrive" Mode in the "Complete Vocal Technique": A Preliminary Study.

Johan Sundberg1, Maddalena Bitelli2, Annika Holmberg3

  • 1Department of Speech Music Hearing, School of Computer Science Communication, KTH, Stockholm, Sweden; Stockholm University College of Music Education, Stockholm, Sweden.

Journal of Voice : Official Journal of the Voice Foundation
|March 29, 2017
PubMed
Summary

This study investigated the physiological characteristics of the "Overdrive" vocal mode in Complete Vocal Technique (CVT). Findings reveal distinct subglottal pressure and vocal fold adduction patterns differentiating "Overdrive" from falsetto phonation.

Keywords:
Flow glottogramFormantsGlottal adductionSubglottal pressureVoice source

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Area of Science:

  • Vocal pedagogy
  • Speech science
  • Acoustic analysis

Background:

  • Complete Vocal Technique (CVT) is a widely adopted voice training method.
  • CVT categorizes vocal production into four "vocal modes," including "Overdrive."
  • The physiological basis of these CVT vocal modes remains largely unexamined.

Purpose of the Study:

  • To analyze the voice source and formant frequency characteristics of the CVT "Overdrive" vocal mode.
  • To investigate the physiological correlates differentiating "Overdrive" from falsetto phonation.

Main Methods:

  • A male and female CVT expert produced "Overdrive" and falsetto tones on /pᴂ/.
  • Inverse filtering was used to analyze the male subject's voice source.
  • Subglottal pressure was estimated via oral pressure during /p/ occlusion.

Main Results:

  • Subglottal pressure was significantly higher in "Overdrive" than falsetto.
  • Strong correlations were found between subglottal pressure and voice source parameters.
  • Deviations suggested increased vocal fold adduction in "Overdrive" compared to falsetto.
  • The "Overdrive" mode involved tuning the first formant to the second partial.

Conclusions:

  • The findings provide physiological insights into the CVT "Overdrive" vocal mode.
  • The methodology shows promise for analyzing other CVT modes and phonation types.
  • Distinct patterns of subglottal pressure and vocal fold adduction characterize "Overdrive" phonation.