Coarticulation in hearing and deaf talkers.
Item
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Title
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Coarticulation in hearing and deaf talkers.
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Identifier
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AAI9630494
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identifier
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9630494
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Creator
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Okalidou, Areti.
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Contributor
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Adviser: Katherine Harris
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Date
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1996
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Language
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English
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Publisher
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City University of New York.
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Subject
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Health Sciences, Speech Pathology | Health Sciences, Audiology
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Abstract
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Research in speech production of deaf individuals has yielded incomplete and conflicting findings regarding coarticulation.;In this study, two experiments were conducted to compare the coarticulatory patterns of three prelingually deafened, orally-trained adults and three hearing controls. In the first experiment, the effect of context on vowels was assessed. F1 and F2 measurements were made on the vowel center of point vowels produced by hearing and deaf talkers in two speaking conditions, namely, in isolation and in context (b{dollar}\sb-{dollar}b and d{dollar}\sb-{dollar}d). In the second experiment, F2 measurements and temporal measurements were taken at specified intervals in disyllables /{dollar}\partial{dollar}#CVC/ where the vowel context was (i), (u), (a), and the consonant context was either b{dollar}\sb-{dollar}b or d{dollar}\sb-{dollar}d. Talkers uttered the disyllables in a carrier phrase "{dollar}\sb{lcub}---{rcub}{dollar}again" at two speaking rates, normal and fast.;Findings indicated that (a) For the hearing talkers the widest distribution of vowels occurred in the isolated condition whereas for the deaf talkers it occurred in the context-embedded conditions. As has been reported previously, in all conditions, the vowel space of the deaf talkers was reduced relative to that of the hearing talkers. (b) Different patterns of anticipatory coarticulation of vowel occurred in the deaf vs. the hearing talkers depending on the phonetic context. The hearing talkers showed greater anticipatory coarticulation of vowel than the deaf talkers in /{dollar}\partial{dollar}bVb/ disyllables. The deaf talkers showed greater anticipatory coarticulation of vowel than the hearing talkers in /{dollar}\partial{dollar}dVd/ disyliables. (c) The hearing talkers showed greater anticipatory coarticulation of consonant context in /{dollar}\partial{dollar}bVb/-/{dollar}\partial{dollar}dVd/ pairs than the deaf talkers. (d) The patterns of anticipatory coarticulation of vowel and consonant segments in the hearing vs. the deaf talkers did not change with changes in speaking rate. (e) Vowel separation was associated with the amount of anticipatory coarticulation for the hearing but not for the deaf talkers. (f) No relationship between vowel distribution and intervocalic coarticulation was shown across talkers differing in hearing status nor for any particular deaf talker.;It was concluded that the speech of the hearing and the deaf talkers is guided by different patterns of articulatory organization.
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Type
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dissertation
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Source
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PQT Legacy CUNY.xlsx
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degree
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Ph.D.
