title: Vocal fundamental frequency characteristics during the first two years of life.
abstract: Vocal fundamental frequency (Fo) characteristics were sampled for a group of seven young children. The children were followed longitudinally for a 12-month period, spanning preword, single-word, and multiword vocalizations. The Fo characteristics were analyzed with reference to chronological age, vocalization length, and lexicon size. Measures of average Fo and Fo variability changed little during the 12-month period for each child. A rising-falling intonation contour was the most prevalent Fo contour among the children. In general, the influence of vocalization length and language acquisition on measures of Fo was negligible. It is suggested that relative uniformity in vocal Fo exists in early vocalizations across preword and meaningful speech periods.
authors.affiliation: John A. Burns School of Medicine, Division of Speech Pathology and Audiology, University of Hawaii, Honolulu 96822.
authors.forename: M P
authors.initials: MP
authors.lastname: Robb
authors.forename: J H
authors.initials: JH
authors.lastname: Saxman
authors.forename: A A
authors.initials: AA
authors.lastname: Grant
mesh_terms: D002675:Child, Preschool; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007223:Infant; D007804:Language Development; D008137:Longitudinal Studies; D008297:Male; D010700:Phonetics; D013018:Sound Spectrography; D014831:Voice; D014833:Voice Quality