Electroglottographic Evaluation of Gender and Vowel Effects During Modal and Vocal Fry Phonation Two unique characteristics of vocal fry register are the occurrence of multiple opening and closing phases occurring within one vibratory cycle and a similar vocal fundamental frequency (F0) between women and men. The present study tested the hypothesis that significant differences in glottal cycle symmetry exist between women and men ... Research Article
Research Article  |   October 01, 2002
Electroglottographic Evaluation of Gender and Vowel Effects During Modal and Vocal Fry Phonation
 
Author Affiliations & Notes
  • Yang Chen, PhD
    Division of Communication Disorders University of Wyoming Laramie
  • Michael P. Robb
    Department of Communication Sciences University of Connecticut Storrs
  • Harvey R. Gilbert
    Department of Communication Sciences University of Connecticut Storrs
  • Contact author: Yang Chen, PhD, Division of Communication Disorders, University of Wyoming, Ross Hall 14, Laramie, WY, 82071-3311. E-mail: yc@uwyo.edu
Article Information
Speech, Voice & Prosody / Speech / Research Articles
Research Article   |   October 01, 2002
Electroglottographic Evaluation of Gender and Vowel Effects During Modal and Vocal Fry Phonation
Journal of Speech, Language, and Hearing Research, October 2002, Vol. 45, 821-829. doi:10.1044/1092-4388(2002/066)
History: Received September 28, 2001 , Accepted April 18, 2002
 
Journal of Speech, Language, and Hearing Research, October 2002, Vol. 45, 821-829. doi:10.1044/1092-4388(2002/066)
History: Received September 28, 2001; Accepted April 18, 2002
Web of Science® Times Cited: 19

Two unique characteristics of vocal fry register are the occurrence of multiple opening and closing phases occurring within one vibratory cycle and a similar vocal fundamental frequency (F0) between women and men. The present study tested the hypothesis that significant differences in glottal cycle symmetry exist between women and men during modal phonation, with no significant differences during vocal fry phonation. Consistent with previous studies of modal phonation, it was also hypothesized that a vowel effect would be apparent during vocal fry phonation. Five women and 5 men sustained modal and vocal fry phonations in four vowel contexts (/agr;, æ, u, i/). Vocal F0, duration of opening and closing phase, and contact symmetry (speed quotient) were derived from electroglottographic (EGG) waveforms. Both female and male speakers demonstrated significantly higher SQ values in vocal fry register than in their modal register, indicating a longer opening-phase duration per glottal cycle. Women demonstrated a significantly greater increase in SQ during vocal fry phonations than men, indicating greater asymmetry between opening and closing durations. The results confirmed that gender differences in vocal fold contact behavior not only exist during modal register but also during vocal fry register. No vowel effects on vocal fold contact behavior as inferred using the SQ measure were found for either modal or vocal fry registers. Possible contributing factors to multiple opening and closing phases occurring within a vibratory cycle are discussed.

Acknowledgments
We wish to acknowledge Lori Erickson who assisted with the reliability measurements. Thanks also to Dr. Emily Lin, who provided valuable comments on earlier versions of this paper.
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