title: Comparison of period-by-period fundamental frequency of stutterers and nonstutterers over repeated utterances.
abstract: The fundamental frequency (f phi) of the first five periods in the acoustic wave form of vowels following stop consonant productions and the f phi of a period approximately 100 ms into the vowel were analyzed in the repeated fluent utterances of 10 nonstutterers and 10 stutterers both pre- and posttherapy. Group data indicate that the nonstutterers and stutterers showed similar f phi diminution patterns in vowels immediately following stop consonants. Additionally, the stutterers were not significantly different from the nonstutterers in their ability to achieve a stable f phi over repeated utterances. These results are discussed with respect to a previous analysis of the present data (Sacco & Metz, 1986) in which it was found that stutterers were significantly more variable than nonstutterers in their ability to achieve a stable f phi over repeated utterances. It is suggested that stutterings in the immediate vicinity of otherwise fluently produced words may influence certain production characteristics of those words.
authors.affiliation: State University of New York, College at Geneseo.
authors.forename: P R
authors.initials: PR
authors.lastname: Sacco
authors.forename: D E
authors.initials: DE
authors.lastname: Metz
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D008297:Male; D010700:Phonetics; D013068:Speech Production Measurement; D013342:Stuttering / Q000175:diagnosis / Q000503:physiopathology*