Clinical Reference

Semi-Occluded Vocal Tract Exercises (SOVTEs): An Expanded Clinical Guide

New release
Therapy Insights Member Exclusive
Print Resource — US Letter — 2 pages

Population:

Adult

Discipline:

SLP

Diagnosis:

Voice

References:

  • Fant, G. (1971). Acoustic theory of speech production: with calculations based on X-ray studies of Russian articulations (No. 2). Walter de Gruyter.
  • Titze, I. R. (1988). The physics of small‐amplitude oscillation of the vocal folds. The Journal of the Acoustical Society of America, 83(4), 1536-1552.
  • Titze, I. R. (2006). Voice training and therapy with a semi-occluded vocal tract: rationale and scientific underpinnings.
  • Guzman, M., Laukkanen, A. M., Traser, L., Geneid, A., Richter, B., Muñoz, D., & Echternach, M. (2017). The influence of water resistance therapy on vocal fold vibration: a high-speed digital imaging study. Logopedics phoniatrics vocology, 42(3), 99-107.
  • Maxfield, L., Titze, I., Hunter, E., & Kapsner-Smith, M. (2015). Intraoral pressures produced by thirteen semi-occluded vocal tract gestures. Logopedics Phoniatrics Vocology, 40(2), 86-92.
  • Mailaender, E., Muehre, L., & Barsties, B. (2017). Lax Vox as a voice training program for teachers: a pilot study. Journal of voice, 31(2), 262-e13.92.
  • Echternach, M., Raschka, J., Kuranova, L., Köberlein, M., Richter, B., Döllinger, M., & Kainz, M. A. (2020). Immediate effects of water resistance therapy on patients with vocal fold mass lesions. European Archives of Oto-Rhino-Laryngology, 277(7), 1995-2003.
This resource breaks down the history, science, and clinical application of semi-occluded vocal tract exercises so therapists can confidently explain why these techniques work and how to tailor them to each client. It offers clear guidance for implementing SOVTEs in meaningful, functional contexts so clients can feel immediate vocal ease and carry that efficiency into real-world communication.
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