Dependence of Phonatory Effort on Hydration Level

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,...

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Bibliographic Details
Published in:Journal of speech and hearing research 1994-10, Vol.37 (5), p.1001-1007
Main Authors: Verdolini, Katherine, Titze, Ingo R, Fennell, Ann
Format: Article
Language:English
Subjects:
Adult
Biological and medical sciences
Brompheniramine - pharmacology
Dehydration - complications
Dehydration - therapy
Double-Blind Method
Drug Combinations
Female
Guaifenesin - pharmacology
Histamine H1 Antagonists - pharmacology
Humans
Humidity
Investigative techniques, diagnostic techniques (general aspects)
Male
Medical sciences
Otorhinolaryngology functional investigation (larynx, voice, audiometry, vestibular function, equilibration...)
Phenylephrine - pharmacology
Phenylpropanolamine - pharmacology
Phonetics
Physical Exertion
Placebos
Pseudoephedrine
Risk Factors
Speech
Viscosity
Vocal Cords - physiopathology
Voice Disorders - epidemiology
Voice Disorders - etiology
Voice Disorders - physiopathology
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Summary: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.
ISSN:0022-4685
1092-4388
1558-9102
DOI:10.1044/jshr.3705.1001