Summary
Objective: This study aimed to map the characteristics and effects of vocal training approaches
in individuals with healthy voice. Methods: This is a scoping review based on three research questions: What are the interventions
used for vocal training of individuals with healthy voice? What are their prescription
parameters? What are their effects? The search was conducted electronically in the
databases of Embase, Lilacs, Medline, Scopus, and Web of Science. The study selection
was based on the reading of titles, abstracts, and full text, applying the eligibility
criteria. Data related to the characteristics of the publication, sample, and intervention
were extracted. Measures/outcomes and results were also extracted. Quantitative synthesis
was performed, and the results were presented in descriptive format. Results: In total, 221 studies were identified during the search, of which 23 were selected.
The most frequently used approach in the vocal training of individuals with healthy
voice was the Semi-Occluded Vocal Tract Exercise (SOVTE), mainly with tube and straw
phonation. Many studies have focused on the immediate effect, with varying dosages.
The main outcome measures were acoustic analysis, aerodynamic evaluation, electroglotography,
and vocal self-assessment. Positive effects were mainly observed on aerodynamic and
acoustic parameters. Only one study reported negative results in the self-assessment.
Conclusions: The SOVTE is most frequently performed to provide an immediate effect in the acoustic
analysis and has also demonstrated positive effects on vocal self-assessment. Medium
and long-term effects and dosages are rarely reported and should be also investigated.
Key Words
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Article info
Publication history
Published online: April 07, 2022
Accepted:
March 8,
2022
Publication stage
In Press Corrected ProofFootnotes
Institution: Research conducted in the Department of Speech Therapy of the Federal University of Paraíba, UFPB, João Pessoa, PB, Brazil.
This study was not supported by any funding source.
Identification
Copyright
© 2022 The Voice Foundation. Published by Elsevier Inc. All rights reserved.
