15th International Congress of Phonetic Sciences (ICPhS-15)
This paper presents results from a longitudinal study of vowel productions
by a girl (H) with cri du chat syndrome (CDCS). Vowel productions in
recordings of H's speech at two different times (4;6 and 7;0) were
subjected to acoustic analysis. The vowels were classified with reference
to the corresponding vowels in target words, and formant frequency
measurements were made of them from spectrograms. The results show
that for all the vowels analyzed both F1 and F2 varied considerably.
Furthermore, analyses of F1/F2 plots at both 4;6 and 7;0 revealed that H's vowel productions did not form the well developed vowel space that is seen in normally developed children at H's age. In spite of this, the data clearly indicate that from 4;6 to 7;0 a distinction between close and non-close vowels developed.
Bibliographic reference. Kristoffersen, Kristian E. (2003): "Vowel production in cri du chat-syndrome - a case study", In ICPhS-15, 1663-1666.