Abstract
This paper presents findings from a perceptual and acoustic study of vowel productions in the speech of three children with cri du chat syndrome, all raised in Norwegian-speaking communities. It is shown that for all three subjects there is considerable variation in different attempts at producing the same target vowels, but to a varying extent depending on both vowel height and quantity. There is also inter-subject variation. Furthermore, there is considerable acoustic overlap between attempts at producing different target vowels. Finally, only to a limited extent do the vowel productions of the three children form vowel spaces comparable to the vowel space of the target language, but again there is inter-subject variation.