Abstract
A model for the aerodynamics and acoustics of affricate consonants is developed. The model is used to predict the changing acoustic pattern that occurs during the 100-odd milliseconds following the release of a palato-alveolar affricate. Appropriate assumptions are made about rates of release and dimensions of cavities in the anterior part of the vocal tract. The calculated acoustic pattern includes an initial transient and an interval in which the frication noise undergoes changes in amplitude and spectrum as the tongue-tip constriction increases in size. Measurements of acoustic spectra following the release of naturally produced affricate consonants show good agreement with spectra predicted from the model.
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