Investigation of Vowel Duration in Stutterers and Nonstutterers

Document Type : Original Article

Authors

1 Master of Speech Therapy, Faculty of Rehabilitation Sciences, Isfahan University of Medical Sciences, Isfahan, Iran

2 Communication Disorders Research Center, Isfahan university of medical sciences, Isfahan, Iran

3 PhD student Speech Therapy, Faculty of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran

Abstract

Purpose:
Some of researchers define stuttering as a disorder in timing feature between acoustic elements and interruption in successful and simultaneous programming of speech muscles movements for a word production. One of the temporal variable is vowel duration. Vowel duration is a feature that demonstrates between nature of phonation differences in stutterers and nonstutterers. The aim of this study was to study and compare the vowel duration in stutterers and nonstutterers.
Methods:
The present study was descriptive and analytic and 22 stutterers and 22 nonstutterers participated and were asked to read a text that contains three contexts cv, cvc, cvcc and 6 vowels. Afterward, its summary and fluent speech from three contexts were selected and recorded by praat software and duration of vowels was computed via spectrogram.
Results:
Independent t test showed that stuttering (P=0.21) and age (P=0.061) did not have significant effect on vowel duration. However these values were higher in stutterers than nonstutterers.
Conclusion:
This study showed that stuttering does not influence the vowel duration. 

Keywords

References

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Journal of Paramedical Sciences & Rehabilitation
Volume 5, Issue 1
March 2016
Pages 51-57

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