Journal article
Bibliometric Analysis, Systematic Review Of Literature, And Meta-Analysis On The Effect Of Amplification On Voice Production Among Teachers
Journal of communication disorders, Vol.117, 106544
09/2025
DOI: 10.1016/j.jcomdis.2025.106544
PMCID: PMC12284958
PMID: 40609491
Abstract
Teaching is identified as a high-risk profession for developing voice disorders due to the significant vocal demands placed on educators. This can lead to symptoms such as vocal fatigue, adversely affecting their quality of life. One common intervention is the provision of voice amplification systems, which have been reported to reduce vocal strain by enabling teachers to speak at lower volumes, thereby potentially improving voice quality and minimizing vocal fold damage. Despite these benefits, various factors such as adoption rates, technical issues, and the need for proper use and training can influence the effectiveness of these systems. This study systematically reviews the literature and conducts a meta-analysis to determine the impact of voice amplification on teachers' vocal function.
The results reported in this manuscript are based on a bibliometric analysis and systematic literature review using seven databases, selecting 20 relevant publications from an initial pool of 462, and performing a meta-analysis to compare vocal metrics with and without amplification.
The meta-analysis indicated that voice amplification systems tend to positively affect fundamental frequency, sound pressure level (SPL), and phonation time percentage; however, these effects were not statistically significant. The analysis also suggests no significant publication bias, though the quality of the included publications varied: 15% were rated as strong, 25% as moderate, and 60% as weak.
The study concludes that voice amplification systems show potential benefits for teachers' vocal health. However, their implementation should be part of a broader strategy that includes education, training, and regular monitoring to maximize their effectiveness.
Details
- Title: Subtitle
- Bibliometric Analysis, Systematic Review Of Literature, And Meta-Analysis On The Effect Of Amplification On Voice Production Among Teachers
- Creators
- Lady Catherine Cantor-Cutiva - East Tennessee State UniversityKarol Acevedo - San Sebastián UniversityMarco Guzman - Universidad de Los Andes, ChileJuan Carlos Gonzalez - San Sebastián UniversityFelipe Enrique Cerda Sandoval - Pontificia Universidad Católica de ChileCatalina Smith - Universidad de Los Andes, ChileIsidora Behm - Universidad de Los Andes, ChileEric Hunter - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Journal of communication disorders, Vol.117, 106544
- DOI
- 10.1016/j.jcomdis.2025.106544
- PMID
- 40609491
- PMCID
- PMC12284958
- NLM abbreviation
- J Commun Disord
- ISSN
- 0021-9924
- eISSN
- 1873-7994
- Publisher
- Elsevier Inc
- Grant note
- National Institutes of Health: R01DC012315, FONIS SA23i0069
The analysis protocols and techniques reported in this publication were partially supported by the National Institute of Deafnessr and Other Communication Disorders of the National Institutes of Health under Award Number R01DC012315 (P.I. Eric Hunter) and by grants from ANID (grant FONIS SA23i0069) (P.I. Karol Acevedo) . The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Institutes of Health.
- Language
- English
- Electronic publication date
- 06/26/2025
- Date published
- 09/2025
- Academic Unit
- Communication Sciences and Disorders; Teaching and Learning
- Record Identifier
- 9984843593202771
Metrics
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