ArticleJournal of voice : official journal of the Voice Foundation2025
Efficacy of a Tesla Valve Straw in a Semi-Occluded Vocal Tract Exercise in a Normal-Voiced Population.
Article in Journal of voice : official journal of the Voice Foundation, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
1 citing paper in PubMed.
- Diodicity of MicroTesla Valves Under Various Re Numbers.Micromachines · 2025Article
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Authors and funding
5 authors.
Funding
Abstract
objectiveVoice disorders affect a significant portion of the US population, affecting communication and professional performance. Semi-occluded vocal tract (SOVT) straw phonation exercises are widely used in voice therapy to enhance phonation efficacy. The Tesla valve, a structure Nikola Tesla designed, could be applied to SOVT straw phonation therapy and increase its effectiveness by increasing resistance without requiring a longer straw length. This study aimed to evaluate the effectiveness of the Tesla valve straw compared to a standard straw and assess the impact of straw length on phonation efficiency.
methodsTwenty-nine normal-voiced participants were randomly assigned to complete SOVT tasks using standard and Tesla valve straws of lengths 25.50 and 31.50 cm. Participants' aerodynamic and acoustic measurements, including phonation threshold pressure (PTP), mean flow rate (MFR), and fundamental frequency (F
resultsSignificant reductions in PTP were observed across all conditions regardless of straw type or length, supporting the use of SOVT straw phonation exercises to reduce PTP. However, no significant differences were observed between the standard and Tesla valve straw types or between the short and long straw lengths. MFR and F
conclusionThe results suggest that while long and short Tesla valve straws generated a greater average PTP decrease than standard straws, the differences were not statistically significant. Additionally, the length of the straws tested did not significantly affect the therapeutic effects of the exercises in the confines of this study. These results support the presence of straw is the most important consideration in straw phonation therapy. Further Tesla valve straw designs should be tested to understand the efficacy of the Tesla valve straw at a wider range of lengths and configurations.
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