Abstract
An approximate finite element (FE) model of acoustic spaces corresponding to the human adult male vocal tract and nasal cavity was created according to the geometrical data published in literature. The FE model for the vowel /a/ was analyzed for increasing size of a cleft, which joints both acoustic spaces. The influence of the cleft palate on the pronunciation of the vowel /a/ is studied using a modal analysis of the FE model. The results of numerical solutions are in reasonable agreement with clinical observations.
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