Journal article
Dependence of Phonatory Effort on Hydration Level
Journal of speech, language, and hearing research, Vol.37(5), pp.1001-1007
10/01/1994
DOI: 10.1044/jshr.3705.1001
PMID: 7823546
Abstract
In this study, a double-blind placebo-controlled approach was used to assess the relation between hydration level and phonatory effort. Twelve adult, untrained voice users with normal voices participated as subjects. Each subject received a 4-hour hydration treatment, a 4-hour dehydration treatment, and a 4-hour placebo (control) treatment. Following each treatment, phonatory effort was measured with a physiological measure, phonation threshold pressure (PTP), and with a psychological measure, direct magnitude estimation of perceived phonatory effort (DMEPPE). Summarizing the results across these measures, the findings indicated an inverse relation between phonatory effort and hydration level, but primarily for high-pitched phonation tasks. The findings for PTPs replicated those from an earlier study conducted without double-blind experimental manipulations (Verdolini-Marston, Titze, & Druker, 1990). Theoretical discussion focuses on the possible role of vocal fold tissue viscosity for hydration and dehydration effects, although direct measures of tissue viscosity are lacking.
Details
- Title: Subtitle
- Dependence of Phonatory Effort on Hydration Level
- Creators
- Katherine Verdolini - University of IowaIngo R. Titze - Denver Center for the Performing ArtsAnn Fennell - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Journal of speech, language, and hearing research, Vol.37(5), pp.1001-1007
- DOI
- 10.1044/jshr.3705.1001
- PMID
- 7823546
- ISSN
- 1092-4388
- eISSN
- 1558-9102
- Number of pages
- 7
- Language
- English
- Date published
- 10/01/1994
- Academic Unit
- School of Music; Communication Sciences and Disorders
- Record Identifier
- 9984719570702771
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