| Abstract | Objective: To identify and categorize the devices used for voice training and therapy.
Methods: This scoping review was registered in the Open Science Framework (DOI: 10.17605/OSF.IO/4RE6C). An electronic search was conducted by reviewing sources in PubMed/Medline, LILACS/BVS, Scopus, Web of Science, EMBASE, and the Cochrane Library. Additionally, a manual search in grey literature was performed. Two independent reviewers, unaware of each other’s selections, chose and extracted data. Discrepancies were resolved through consensus. The information gathered in this study phase included authorship and publication year, country, study design, sample characteristics, intervention type, ingredients, target, mechanism of action, dosage, and outcome measures. These details were subjected to descriptive analysis.
Results: Publications incorporating devices as ingredients have primarily emerged in the last two decades (83.06%), with a predominant focus on the United States (23.66%) and Brazil (22.48%). These studies predominantly involved adults of both genders (62.13%) with behavioral dysphonia (31.36%). A total of 42 distinct types of devices have been utilized, often sharing similar methodologies but differing terminology. Most of these devices were used volitionally (78.69%) to enhance vocal function (33.13%), specifically targeting the enhancement of source and filter interaction (23.07%). Silicone tubes were the most frequently used device (18.34%). Surface electrodes on the neck were the most reported technical specifications for device application (18.93%). The administration of device dosage was controlled by time (66.86%). Self-assessment (55.02%) and acoustic analysis (54.43%) were the most used outcome in these studies.
Conclusion: Currently, devices play a crucial role in vocal interventions, particularly enhancing the interaction between the source and filter. Silicone tubes are the most utilized among these devices, and their administration is typically time controlled. Self-assessment is the outcome frequently employed to evaluates the interventions.
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