Therapeutic effect of semi-occluded vocal tract exercises in patients with type i muscle tension dysphonia

Marco Guzmán, Claudia Callejas, Christian Castro, Pablo García-Campo, Daniela Lavanderos, María José Valladares, Daniel Muñoz, Cristina Carmona

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

Phonation with semi-occluded postures of the vocal tract and phonation into resonance tubes are widely used in voice therapy and voice training. These techniques increase the source/filter interaction and produce several physiologic and acoustic effects such as an increase in the inertive reactance of the vocal tract in the 200-1000. Hz range and thereby reinforce vocal fold vibration. Eleven acting students of both sexes diagnosed with type I muscle tension dysphonia were treated with a sequence of semi-occluded vocal tract exercises over six sessions. This sequence included a prolonged bilabial consonant/ß:/and artificial lengthening of the vocal tract using resonance tubes. The phonatory tasks consisted of a sustained phonation in a comfortable pitch, and ascending/descending pitch glides. Voice samples were recorded before and after six sessions of voice therapy. Flexible laryngoscopy and spectral analysis using a spectrogram with a narrow filter at real time were used for analysis. Spectrograms were evaluated by five blinded judges on a 100. mm visual analogue scale. Two time points were compared and a statistical analysis was performed. Significant positive changes were observed by spectral analysis evaluation and laryngeal muscle pattern changes. The results indicate that the use of resonance tubes and semi-occluded postures of the vocal tract can have a therapeutic effect in patients with type I muscle tension dysphonia.
Original languageAmerican English
Pages (from-to)139-146
Number of pages8
JournalRevista de Logopedia, Foniatria y Audiologia
Volume32
Issue number3
DOIs
StatePublished - 1 Jul 2012
Externally publishedYes

Keywords

  • Acoustic impedance
  • Dysphonia
  • Vocal therapy
  • Vocal tract

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