Document Detail


A quantitative output-cost ratio in voice production.
MedLine Citation:
PMID:  11218106     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
A quantitative output-cost ratio (OCR) is proposed for objective use in voice production and is defined as the ratio of the acoustic output intensity to the collision intensity of the vocal folds. Measurement of the OCR is demonstrated in a laboratory experiment using 5 excised larynges and a transducer designed for use on human subjects. Data were gathered at constant fundamental frequency (150 Hz). Subglottal pressure was varied from 1.0 to 1.6 kPa, and glottal width at the vocal processes was varied from a pressed condition to a 2-mm gap. The OCR was plotted as a function of glottal width. With no vocal tract, the excised larynx experiments yielded a broad maxima in the OCR curves, across all subglottal pressure conditions, at about 0.6 mm. Computer simulations indicate that sharper maxima may occur when the influence of the vocal tract is taken into account. The potential clinical utility of the OCR is discussed for treatment of a wide range of voice disorders, including those involving both hyper- and hypoadduction.
Authors:
D A Berry; K Verdolini; D W Montequin; M M Hess; R W Chan; I R Titze
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Journal of speech, language, and hearing research : JSLHR     Volume:  44     ISSN:  1092-4388     ISO Abbreviation:  J. Speech Lang. Hear. Res.     Publication Date:  2001 Feb 
Date Detail:
Created Date:  2001-02-19     Completed Date:  2001-05-10     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  9705610     Medline TA:  J Speech Lang Hear Res     Country:  United States    
Other Details:
Languages:  eng     Pagination:  29-37     Citation Subset:  IM    
Affiliation:
The University of Iowa, Iowa City, USA.
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MeSH Terms
Descriptor/Qualifier:
Acoustics
Animals
Dogs
Larynx / physiology*
Transducers
Voice Disorders / diagnosis*
Grant Support
ID/Acronym/Agency:
1 K08 DC00139/DC/NIDCD NIH HHS; P60 DC00976/DC/NIDCD NIH HHS; R29 DC03072/DC/NIDCD NIH HHS

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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