Spectral Slope of Vowels Produced by Tracheoesophageal Speakers Spectra of vowels were analyzed to determine whether differences exist between the spectral slope of vowels produced by tracheoesophageal (TE) speakers and normal speakers and, if so, to quantify such differences. The linear predictive autocorrelation method was used to calculate smoothed spectra and the spectra were normalized with respect to ... Research Article
Research Article  |   April 01, 1991
Spectral Slope of Vowels Produced by Tracheoesophageal Speakers
 
Author Affiliations & Notes
  • Yingyong Qi
    University of Arizona
  • Bernd Weinberg
    University of Arizona
  • Requests for reprints should be sent to Yingyong Qi, Department of Speech and Hearing Sciences, University of Arizona, Tucson, AZ 85721.
Article Information
Speech / Research Articles
Research Article   |   April 01, 1991
Spectral Slope of Vowels Produced by Tracheoesophageal Speakers
Journal of Speech, Language, and Hearing Research, April 1991, Vol. 34, 243-247. doi:10.1044/jshr.3402.243
History: Received March 26, 1990 , Accepted July 27, 1990
 
Journal of Speech, Language, and Hearing Research, April 1991, Vol. 34, 243-247. doi:10.1044/jshr.3402.243
History: Received March 26, 1990; Accepted July 27, 1990

Spectra of vowels were analyzed to determine whether differences exist between the spectral slope of vowels produced by tracheoesophageal (TE) speakers and normal speakers and, if so, to quantify such differences. The linear predictive autocorrelation method was used to calculate smoothed spectra and the spectra were normalized with respect to a low frequency component. Comparisons between normalized spectral energy within a selected high frequency range revealed that energy within this frequency range for vowels produced by TE speakers was significantly higher than that produced by normal speakers. A least-square distance matching procedure was used to quantify speaker group differences in the spectral slope of vowels. Average spectra of vowels produced by the normal speakers could be matched to average spectra of vowels produced by the TE speakers by decreasing the spectral slope of their vowels by 2–3 dB/octave.

Acknowledgments
This study was supported in part by a New Investigator Grant from American Speech-Language-Hearing Foundation to the first author. We also wish to acknowledge the enthusiastic participation of the members of Tucson NuVoice Club, and the assistance of Sherrill Howard, speech-language pathologist.
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