Syllable-Related Breathing in Infants in the Second Year of Life PurposeThis study explored whether breathing behaviors of infants within the 2nd year of life differ between tidal breathing and breathing supporting single unarticulated syllables and canonical/articulated syllables.MethodVocalizations and breathing kinematics of 9 infants between 53 and 90 weeks of age were recorded. A strict selection protocol was used to identify ... Article
Article  |   August 01, 2011
Syllable-Related Breathing in Infants in the Second Year of Life
 
Author Affiliations & Notes
  • Douglas F. Parham
    Wichita State University, Wichita, KS
    Wichita State University, Wichita, KS
  • Eugene H. Buder
    University of Memphis, TN
    University of Memphis, TN
  • D. Kimbrough Oller
    University of Memphis, TN
    University of Memphis, TN
  • Carol A. Boliek
    University of Alberta, Edmonton, Alberta, Canada
    University of Alberta, Edmonton, Alberta, Canada
  • Correspondence to Douglas F. Parham: douglas.parham@wichita.edu
  • Editor: Anne Smith
    Editor: Anne Smith×
  • Associate Editor: David McFarland
    Associate Editor: David McFarland×
Article Information
Speech, Voice & Prosody / Speech
Article   |   August 01, 2011
Syllable-Related Breathing in Infants in the Second Year of Life
Journal of Speech, Language, and Hearing Research, August 2011, Vol. 54, 1039-1050. doi:10.1044/1092-4388(2010/09-0106)
History: Received May 28, 2009 , Revised January 31, 2010 , Accepted December 2, 2010
 
Journal of Speech, Language, and Hearing Research, August 2011, Vol. 54, 1039-1050. doi:10.1044/1092-4388(2010/09-0106)
History: Received May 28, 2009; Revised January 31, 2010; Accepted December 2, 2010
Web of Science® Times Cited: 2

PurposeThis study explored whether breathing behaviors of infants within the 2nd year of life differ between tidal breathing and breathing supporting single unarticulated syllables and canonical/articulated syllables.

MethodVocalizations and breathing kinematics of 9 infants between 53 and 90 weeks of age were recorded. A strict selection protocol was used to identify analyzable breath cycles. Syllables were categorized on the basis of consensus coding. Inspiratory and expiratory durations, excursions, and slopes were calculated for the 3 breath cycle types and were normalized using mean tidal breath measures.

ResultsTidal breathing cycles were significantly different from syllable-related cycles on all breathing measures. There were no significant differences between unarticulated syllable cycles and canonical syllable cycles, even after controlling for utterance duration and sound pressure level.

ConclusionsInfants in the 2nd year of life exhibit clear differences between tidal breathing and speech-related breathing, but categorically distinct breath support for syllable types with varying articulatory demands was not evident in the present findings. Speech development introduces increasingly complex utterances, so older infants may produce detectable articulation-related adaptations of breathing kinematics. For younger infants, breath support may vary systematically among utterance types, due more to phonatory variations than to articulatory demands.

Acknowledgments
This research was supported by National Institute on Deafness and Other Communication Disorders Grants F31DC008276 (awarded to the first author) and R01DC006099 (awarded to the second and third authors). The first author gratefully acknowledges Wichita State University’s generous financial support for this study. Special thanks are extended to Karen Grace-Martin for her advice regarding the statistical analysis of the study’s dataset. We also thank Liu Shi Gan, Rachel McGlashen, Heather Ramsdell, and Erica Smith for their assistance in various aspects of this study.
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