Abstract

In the production of stop consonants by hearing-impaired subjects, voicing errors are far more frequent than place of articulation errors. The problem arises from the phonetic complexity of some of the various kinds of homorganic plosives. The English-speaking deaf encounter special difficulties in the pronounciation of the aspirated/ptk/ which require a precise temporal delay between oral closure and laryngeal opening. The data presented in this paper show that the French-speaking deaf encounter similar difficulties in the production of the prevoiced/bdg/ which require a precise temporal delay between the onset of laryngeal vibrations and the release of oral closure. The rapid sequential delivery of these two articulatory gestures enables the speaker to sustain the voice up to the end of the closure, which has decisive importance for voicing perception. Our data also show that the speakers who correctly produce prevoicing can generally perceive the voicing feature. Although the place of articulation of the stops is not better perceived than their voicing category, most of the moderately-deaf subjects in this experiment can produce the place distinctions perfectly. The role of perceptual feedbacks in the mastering of articulatory gestures is discussed.

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