Individual Monitoring of Vocal Effort With Relative Fundamental Frequency: Relationships With Aerodynamics and Listener Perception.

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Bibliographic Details
Title:	Individual Monitoring of Vocal Effort With Relative Fundamental Frequency: Relationships With Aerodynamics and Listener Perception.
Authors:	Lien, Yu-An S.¹ slien@bu.edu, Michener, Carolyn M.¹, Eadie, Tanya L.², Stepp, Cara E.¹
Source:	Journal of Speech, Language & Hearing Research. Jun2015, Vol. 58 Issue 3, p566-575. 10p. 4 Graphs.
Subject Terms:	Speech evaluation, Speech perception, Consonants, Statistical correlation, Experimental design, Inter-observer reliability, Voice frequency, Aerodynamics, Physiological aspects of speech, Research evaluation, Research funding, Wave analysis, Data analysis software, Descriptive statistics
Abstract:	Purpose: The acoustic measure relative fundamental frequency (RFF) was investigated as a potential objective measure to track variations in vocal effort within and across individuals. Method: Twelve speakers with healthy voices created purposeful modulations in their vocal effort during speech tasks. RFF and an aerodynamic measure of vocal effort, the ratio of sound pressure level to subglottal pressure level, were estimated from the aerodynamic and acoustic signals. Twelve listeners also judged the speech samples for vocal effort using the visual sort and rate method. Results: Relationships between RFF and both the aerodynamic and perceptual measures of vocal effort were weak across speakers (R² = .06-.26). Within speakers, relationships were variable but much stronger on average (R² = .45-.56). Conclusions: RFF showed stronger relationships between both the aerodynamic and perceptual measures of vocal effort when examined within individuals versus across individuals. Future work is necessary to establish these relationships in individuals with voice disorders across the therapeutic process. [ABSTRACT FROM AUTHOR]
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Database:	Education Research Complete

Description
Abstract:	Purpose: The acoustic measure relative fundamental frequency (RFF) was investigated as a potential objective measure to track variations in vocal effort within and across individuals. Method: Twelve speakers with healthy voices created purposeful modulations in their vocal effort during speech tasks. RFF and an aerodynamic measure of vocal effort, the ratio of sound pressure level to subglottal pressure level, were estimated from the aerodynamic and acoustic signals. Twelve listeners also judged the speech samples for vocal effort using the visual sort and rate method. Results: Relationships between RFF and both the aerodynamic and perceptual measures of vocal effort were weak across speakers (R² = .06-.26). Within speakers, relationships were variable but much stronger on average (R² = .45-.56). Conclusions: RFF showed stronger relationships between both the aerodynamic and perceptual measures of vocal effort when examined within individuals versus across individuals. Future work is necessary to establish these relationships in individuals with voice disorders across the therapeutic process. [ABSTRACT FROM AUTHOR]
ISSN:	10924388
DOI:	10.1044/2015_JSLHR-S-14-0194