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Updated: Jun 3, 2025

Hemi-laryngeal Setup for Studying Vocal Fold Vibration in Three Dimensions
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Vocal Instabilities in Untrained Female Singers.

Michelle M Bretl1, Ronald C Scherer2

  • 1Department of Surgery, Department of Communication Sciences and Disorders, University of Wisconsin - Madison, Madison, WI.

Journal of Voice : Official Journal of the Voice Foundation
|January 8, 2025
PubMed
Summary
This summary is machine-generated.

Untrained female singers can produce smooth octave scales with specific voice instabilities. The primary unsteadiness involved aphonic segments and intensity reduction, with subtle instabilities linked to register changes.

Keywords:
Singer—Vocal instability—Electroglottography—Airflow—Fundamental frequency

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Area of Science:

  • Vocal pedagogy and acoustics
  • Speech and hearing science

Background:

  • Vocal instabilities in untrained singers are not well-characterized.
  • Understanding these instabilities is crucial for effective vocal training.

Purpose of the Study:

  • Identify and describe voice instabilities in untrained female singers during octave scale production.
  • Relate instabilities to acoustic, airflow, intensity, and electroglottography (EGG) parameters.

Main Methods:

  • A multisignal descriptive study involving five untrained female singers.
  • Singers produced octave scales with /α/ and /i/ vowels, at different dynamics, and across register transitions, in smooth and unsteady conditions.
  • Acoustic, airflow, intensity, and EGG data were analyzed, categorizing scales as Smooth, Middle, or Unsteady.

Main Results:

  • Thirteen types of voice instabilities were identified, with counts ranging from zero to fourteen per scale.
  • Unsteady scales exhibited more instabilities, including aphonic segments and significant intensity reductions.
  • Subtle instabilities, like EGG signal changes, were present even in Smooth scales.

Conclusions:

  • Untrained singers can achieve smooth scale production.
  • Aphonic segments and intensity drops are key indicators of vocal unsteadiness.
  • Objective measures may highlight instabilities not readily perceived auditorily, offering insights into vocal control and register transitions.