Characterizing Vibratory Kinematics in Children and Adults With High-Speed Digital Imaging PurposeThe aim of this study is to quantify and identify characteristic vibratory motion in typically developing prepubertal children and young adults using high-speed digital imaging.MethodThe vibrations of the vocal folds were recorded from 27 children (ages 5–9 years) and 35 adults (ages 21–45 years), with high speed at 4,000 frames ... Supplement
Supplement  |   April 01, 2014
Characterizing Vibratory Kinematics in Children and Adults With High-Speed Digital Imaging
 
Author Affiliations & Notes
  • Rita Patel
    Indiana University, Bloomington
  • Denis Dubrovskiy
    University Hospital Erlangen Medical School, Germany
  • Michael Döllinger
    University Hospital Erlangen Medical School, Germany
  • Disclosure Statement:The authors have declared that no competing interests existed at the time of publication.
    Disclosure Statement:The authors have declared that no competing interests existed at the time of publication.×
  • Correspondence to Rita Patel: patelrir@indiana.edu
  • Editor: Jody Kreiman
    Editor: Jody Kreiman×
  • Associate Editor: Dimitar Deliyski
    Associate Editor: Dimitar Deliyski×
Article Information
Speech, Voice & Prosody / Supplement
Supplement   |   April 01, 2014
Characterizing Vibratory Kinematics in Children and Adults With High-Speed Digital Imaging
Journal of Speech, Language, and Hearing Research, April 2014, Vol. 57, S674-S686. doi:10.1044/2014_JSLHR-S-12-0278
History: Received August 31, 2012 , Revised May 1, 2013 , Accepted October 21, 2013
 
Journal of Speech, Language, and Hearing Research, April 2014, Vol. 57, S674-S686. doi:10.1044/2014_JSLHR-S-12-0278
History: Received August 31, 2012; Revised May 1, 2013; Accepted October 21, 2013
Web of Science® Times Cited: 6

PurposeThe aim of this study is to quantify and identify characteristic vibratory motion in typically developing prepubertal children and young adults using high-speed digital imaging.

MethodThe vibrations of the vocal folds were recorded from 27 children (ages 5–9 years) and 35 adults (ages 21–45 years), with high speed at 4,000 frames per second for sustained phonation. Kinematic features of amplitude periodicity, time periodicity, phase asymmetry, spatial symmetry, and glottal gap index were analyzed from the glottal area waveform across mean and standard deviation (i.e., intercycle variability) for each measure.

ResultsChildren exhibited lower mean amplitude periodicity compared to men and women and lower time periodicity compared to men. Children and women exhibited greater variability in amplitude periodicity, time periodicity, phase asymmetry, and glottal gap index compared to men. Women had lower mean values of amplitude periodicity and time periodicity compared to men.

ConclusionChildren differed both spatially but more temporally in vocal fold motion, suggesting the need for the development of children-specific kinematic norms. Results suggest more uncontrolled vibratory motion in children, reflecting changes in the vocal fold layered structure and aero-acoustic source mechanisms.

Acknowledgments
This research was supported by National Institute on Deafness and Other Communication Disorders Grant R03DC11360 and by the American Speech-Language and Hearing Foundation's New Investigator Research Grant, awarded to the first author. The third author's contribution was made possible by Deutsche Krebshilfe Grant 109204 and Deutsche Forschungsgemeinschaft FOR894/1-2.
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