Consistency of Fundamental Frequency and Perturbation in Repeated Phonations of Sustained Vowels, Reading, and Connected Speech The purpose of this study was to determine consistency of the acoustic measurement of fundamental frequency (f0) and f0 perturbation using the Visi-Pitch. Samples of speech including a reading passage, vowels, and spontaneous speech were recorded for 12 normal young adults (6 men and 6 women). The results indicated that ... Research Article
Research Article  |   May 01, 1990
Consistency of Fundamental Frequency and Perturbation in Repeated Phonations of Sustained Vowels, Reading, and Connected Speech
 
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Research Article   |   May 01, 1990
Consistency of Fundamental Frequency and Perturbation in Repeated Phonations of Sustained Vowels, Reading, and Connected Speech
Journal of Speech and Hearing Disorders, May 1990, Vol. 55, 360-363. doi:10.1044/jshd.5502.360
History: Received March 4, 1988 , Revised August 4, 1989 , Accepted October 2, 1989
 
Journal of Speech and Hearing Disorders, May 1990, Vol. 55, 360-363. doi:10.1044/jshd.5502.360
History: Received March 4, 1988; Revised August 4, 1989; Accepted October 2, 1989

The purpose of this study was to determine consistency of the acoustic measurement of fundamental frequency (f0) and f0 perturbation using the Visi-Pitch. Samples of speech including a reading passage, vowels, and spontaneous speech were recorded for 12 normal young adults (6 men and 6 women). The results indicated that test-retest reliability was highest for the reading passage. The measurements of fundamental frequency for reading and spontaneous speech were very similar, but vowel production was, on average, higher in frequency than the other contexts. Test-retest measures of perturbation using the Visi-Pitch did not have a high correlation coefficient. Perturbation measures must be interpreted cautiously because of the influence of frequency.

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