Effects on Vocal Fold Collision and Phonation Threshold Pressure of Resonance Tube Phonation With Tube End in Water PurposeResonance tube phonation in water (RTPW) or in air is a voice therapy method successfully used for treatment of several voice pathologies. Its effect on the voice has not been thoroughly studied. This investigation analyzes the effects of RTPW on collision and phonation threshold pressures (CTP and PTP), the lowest ... Article
Article  |   October 01, 2013
Effects on Vocal Fold Collision and Phonation Threshold Pressure of Resonance Tube Phonation With Tube End in Water
 
Author Affiliations & Notes
  • Laura Enflo
    Linköping University, Linköping, Sweden
  • Johan Sundberg
    Royal Institute of Technology (KTH), Stockholm, Sweden
  • Camilla Romedahl
    Stockholm, Sweden
  • Anita McAllister
    Linköping University, Linköping, Sweden
  • Correspondence to Laura Enflo: lenflo@kth.se
  • Editor: Jody Kreiman
    Editor: Jody Kreiman×
  • Associate Editor: Katherine Verdolini Abbott
    Associate Editor: Katherine Verdolini Abbott×
Article Information
Speech, Voice & Prosody / Speech
Article   |   October 01, 2013
Effects on Vocal Fold Collision and Phonation Threshold Pressure of Resonance Tube Phonation With Tube End in Water
Journal of Speech, Language, and Hearing Research, October 2013, Vol. 56, 1530-1538. doi:10.1044/1092-4388(2013/12-0040)
History: Received January 30, 2012 , Revised July 15, 2012 , Accepted February 18, 2013
 
Journal of Speech, Language, and Hearing Research, October 2013, Vol. 56, 1530-1538. doi:10.1044/1092-4388(2013/12-0040)
History: Received January 30, 2012; Revised July 15, 2012; Accepted February 18, 2013
Web of Science® Times Cited: 11

PurposeResonance tube phonation in water (RTPW) or in air is a voice therapy method successfully used for treatment of several voice pathologies. Its effect on the voice has not been thoroughly studied. This investigation analyzes the effects of RTPW on collision and phonation threshold pressures (CTP and PTP), the lowest subglottal pressure needed for vocal fold collision and phonation, respectively.

MethodTwelve mezzo-sopranos phonated into a glass tube, the end of which was placed under the water surface in a jar. Subglottal pressure, electroglottography, and audio signals were recorded before and after exercise. Also, the perceptual effects were assessed in a listening test with an expert panel, who also rated the subjects' singing experience.

ResultsResonance tube phonation significantly increased CTP and also tended to improve perceived voice quality. The latter effect was mostly greater in singers who did not practice singing daily. In addition, a more pronounced perceptual effect was found in singers rated as being less experienced.

ConclusionResonance tube phonation significantly raised CTP and tended to improve perceptual ratings of voice quality. The effect on PTP did not reach significance.

Acknowledgments
The kind cooperation of our singer subjects and of the expert listeners participating in the listening test are gratefully acknowledged. We are also indebted to the mathematician Kirsti Mattila, at the Royal Institute of Technology, for valuable discussions about mathematical and statistical aspects of this research.
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