Kinematic Measurements of the Vocal-Fold Displacement Waveform in Typical Children and Adult Populations: Quantification of High-Speed Endoscopic Videos Purpose This article presents a quantitative method for assessing instantaneous and average lateral vocal-fold motion from high-speed digital imaging, with a focus on developmental changes in vocal-fold kinematics during childhood. Method Vocal-fold vibrations were analyzed for 28 children (aged 5–11 years) and 28 adults (aged 21–45 years) without ... Research Article
Research Article  |   April 01, 2015
Kinematic Measurements of the Vocal-Fold Displacement Waveform in Typical Children and Adult Populations: Quantification of High-Speed Endoscopic Videos
 
Author Affiliations & Notes
  • Rita Patel
    Indiana University, Bloomington
  • Kevin D. Donohue
    University of Kentucky, Lexington
  • Harikrishnan Unnikrishnan
    University of Kentucky, Lexington
  • Richard J. Kryscio
    University of Kentucky, Lexington
  • Disclosure: The authors have declared that no competing interests existed at the time of publication.
    Disclosure: 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: Scott Thomson
    Associate Editor: Scott Thomson×
Article Information
Speech, Voice & Prosody / Speech / Research Articles
Research Article   |   April 01, 2015
Kinematic Measurements of the Vocal-Fold Displacement Waveform in Typical Children and Adult Populations: Quantification of High-Speed Endoscopic Videos
Journal of Speech, Language, and Hearing Research, April 2015, Vol. 58, 227-240. doi:10.1044/2015_JSLHR-S-13-0056
History: Received March 7, 2013 , Revised October 24, 2013 , Accepted December 22, 2014
 
Journal of Speech, Language, and Hearing Research, April 2015, Vol. 58, 227-240. doi:10.1044/2015_JSLHR-S-13-0056
History: Received March 7, 2013; Revised October 24, 2013; Accepted December 22, 2014
Web of Science® Times Cited: 3

Purpose This article presents a quantitative method for assessing instantaneous and average lateral vocal-fold motion from high-speed digital imaging, with a focus on developmental changes in vocal-fold kinematics during childhood.

Method Vocal-fold vibrations were analyzed for 28 children (aged 5–11 years) and 28 adults (aged 21–45 years) without voice disorders. The following kinematic features were analyzed from the vocal-fold displacement waveforms: relative velocity-based features (normalized average and peak opening and closing velocities), relative acceleration-based features (normalized peak opening and closing accelerations), speed quotient, and normalized peak displacement.

Results Children exhibited significantly larger normalized peak displacements, normalized average and peak opening velocities, normalized average and peak closing velocities, peak opening and closing accelerations, and speed quotient compared to adult women. Values of normalized average closing velocity and speed quotient were higher in children compared to adult men.

Conclusions When compared to adult men, developing children typically have higher estimates of kinematic features related to normalized displacement and its derivatives. In most cases, the kinematic features of children are closer to those of adult men than adult women. Even though boys experience greater changes in glottal length and pitch as they mature, results indicate that girls experience greater changes in kinematic features compared to boys.

Acknowledgments
This research was supported by National Institute on Deafness and Other Communication Disorders Grant R03DC11360, awarded to Rita Patel. We thank Sid Khosla and Karen Forrest for their valuable input on this article.
Order a Subscription
Pay Per View
Entire Journal of Speech, Language, and Hearing Research content & archive
24-hour access
This Article
24-hour access