Responses to Intensity-Shifted Auditory Feedback During Running Speech Purpose Responses to intensity perturbation during running speech were measured to understand whether prosodic features are controlled in an independent or integrated manner. Method Nineteen English-speaking healthy adults (age range = 21–41 years) produced 480 sentences in which emphatic stress was placed on either the 1st or 2nd ... Research Article
Research Article  |   December 01, 2015
Responses to Intensity-Shifted Auditory Feedback During Running Speech
 
Author Affiliations & Notes
  • Rupal Patel
    Northeastern University, Boston, MA
    Harvard–MIT Division of Health Sciences and Technology, Cambridge, MA
  • Kevin J. Reilly
    University of Tennessee Health Science Center, Knoxville
  • Erin Archibald
    Northeastern University, Boston, MA
  • Shanqing Cai
    Boston University, MA
  • Frank H. Guenther
    Harvard–MIT Division of Health Sciences and Technology, Cambridge, MA
    Boston University, MA
  • 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 Rupal Patel: r.patel@neu.edu
  • Editor: Jody Kreiman
    Editor: Jody Kreiman×
  • Associate Editor: Kate Bunton
    Associate Editor: Kate Bunton×
Article Information
Hearing & Speech Perception / Speech, Voice & Prosody / Speech / Research Articles
Research Article   |   December 01, 2015
Responses to Intensity-Shifted Auditory Feedback During Running Speech
Journal of Speech, Language, and Hearing Research, December 2015, Vol. 58, 1687-1694. doi:10.1044/2015_JSLHR-S-15-0164
History: Received May 2, 2015 , Revised August 11, 2015 , Accepted August 12, 2015
 
Journal of Speech, Language, and Hearing Research, December 2015, Vol. 58, 1687-1694. doi:10.1044/2015_JSLHR-S-15-0164
History: Received May 2, 2015; Revised August 11, 2015; Accepted August 12, 2015

Purpose Responses to intensity perturbation during running speech were measured to understand whether prosodic features are controlled in an independent or integrated manner.

Method Nineteen English-speaking healthy adults (age range = 21–41 years) produced 480 sentences in which emphatic stress was placed on either the 1st or 2nd word. One participant group received an upward intensity perturbation during stressed word production, and the other group received a downward intensity perturbation. Compensations for perturbation were evaluated by comparing differences in participants' stressed and unstressed peak fundamental frequency (F0), peak intensity, and word duration during perturbed versus baseline trials.

Results Significant increases in stressed–unstressed peak intensities were observed during the ramp and perturbation phases of the experiment in the downward group only. Compensations for F0 and duration did not reach significance for either group.

Conclusions Consistent with previous work, speakers appear sensitive to auditory perturbations that affect a desired linguistic goal. In contrast to previous work on F0 perturbation that supported an integrated-channel model of prosodic control, the current work only found evidence for intensity-specific compensation. This discrepancy may suggest different F0 and intensity control mechanisms, threshold-dependent prosodic modulation, or a combined control scheme.

Acknowledgments
This research was supported in part by National Institute on Deafness and Other Communication Disorders Grants R01 DC002852 (F. Guenther, P. I.) and R03 DC011159. (K. Reilly, P. I.)
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