Acoustic Characteristics of /s/ in Adolescents The goal of the current study was to construct a reference database against which misarticulations of /s/ can be compared. Acoustic data for 26 typically speaking 9- to 15-year-olds were examined to resolve measurement issues in acoustic analyses, including alternative sampling points within the /s/ frication; the informativeness of linear ... Research Article
Research Article  |   June 01, 1999
Acoustic Characteristics of /s/ in Adolescents
 
Author Affiliations & Notes
  • Peter Flipsen, Jr.
    Waisman Center University of Wisconsin-Madison
  • Lawrence Shriberg
    Waisman Center University of Wisconsin-Madison
  • Gary Weismer
    Waisman Center University of Wisconsin-Madison
  • Heather Karlsson
    Waisman Center University of Wisconsin-Madison
  • Jane McSweeny
    Waisman Center University of Wisconsin-Madison
  • Contact author: Lawrence D. Shriberg, the Phonology Project, Waisman Center on Mental Retardation and Human Development, University of Wisconsin-Madison, 1500 Highland Avenue, Madison, WI 53705.
    Contact author: Lawrence D. Shriberg, the Phonology Project, Waisman Center on Mental Retardation and Human Development, University of Wisconsin-Madison, 1500 Highland Avenue, Madison, WI 53705.×
  • Corresponding author: e-mail: shriberg@waisman.wisc.edu
  • Currently affiliated with Minnesota State University, Mankato
    Currently affiliated with Minnesota State University, Mankato×
Article Information
Hearing & Speech Perception / Acoustics / Language / Research Articles
Research Article   |   June 01, 1999
Acoustic Characteristics of /s/ in Adolescents
Journal of Speech, Language, and Hearing Research, June 1999, Vol. 42, 663-677. doi:10.1044/jslhr.4203.663
History: Received May 26, 1998 , Accepted October 1, 1998
 
Journal of Speech, Language, and Hearing Research, June 1999, Vol. 42, 663-677. doi:10.1044/jslhr.4203.663
History: Received May 26, 1998; Accepted October 1, 1998

The goal of the current study was to construct a reference database against which misarticulations of /s/ can be compared. Acoustic data for 26 typically speaking 9- to 15-year-olds were examined to resolve measurement issues in acoustic analyses, including alternative sampling points within the /s/ frication; the informativeness of linear versus Bark transformations of each of the 4 spectral moments of /s/ (Forrest, Weismer, Milenkovic, & Dougall, 1988); and measurement effects associated with linguistic context, age, and sex. Analysis of the reference data set indicates that acoustic characterization of /s/ is appropriately and optimally (a) obtained from the midpoint of /s/, (b) represented in linear scale, (c) reflected in summary statistics for the 1st and 3rd spectral moments, (d) referenced to individual linguistic-phonetic contexts, (e) collapsed across the age range studied, and (f) described individually by sex.

Acknowledgments
Thanks to the following colleagues for their assistance: Chad Allen, Diane Austin, Kate Bunton, Frederic Gruber, Robert Hagiwara, Doris Kistler, Rachel Riely, Kristin Tjaden, and David Wilson. Preparation of this paper was supported by the National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Grant DC00496.
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