Coarticulation Effects in Lipreading Normal-hearing and hearing-impaired subjects with good lipreading skills lipread videotaped material under visual-only conditions. V1CV2 utterances were used where V could he /i/, /æ/ or/u/ and C could be /p/, /t/, /k/, /t∫/, /f/, /Θ/, /s/, /∫/ or/w/.Coarticulatory effects were present in these stimuli. The influence of phonetic context on ... Research Article
Research Article  |   December 01, 1982
Coarticulation Effects in Lipreading
 
Author Affiliations & Notes
  • Andre-Pierre Benguerel
    University of British Columbia, Vancouver, Canada
  • Margaret Kathleen Pichora-Fuller
    Mt. Sinai Hospital, Toronto, Ontario, Canada
Article Information
Research Articles
Research Article   |   December 01, 1982
Coarticulation Effects in Lipreading
Journal of Speech, Language, and Hearing Research, December 1982, Vol. 25, 600-607. doi:10.1044/jshr.2504.600
History: Received June 25, 1981 , Accepted March 15, 1982
 
Journal of Speech, Language, and Hearing Research, December 1982, Vol. 25, 600-607. doi:10.1044/jshr.2504.600
History: Received June 25, 1981; Accepted March 15, 1982

Normal-hearing and hearing-impaired subjects with good lipreading skills lipread videotaped material under visual-only conditions. V1CV2 utterances were used where V could he /i/, /æ/ or/u/ and C could be /p/, /t/, /k/, /t∫/, /f/, /Θ/, /s/, /∫/ or/w/.Coarticulatory effects were present in these stimuli. The influence of phonetic context on lipreading scores for each V and C was analyzed in an effort to explain some of the variability in the visual perception of phonemes which was suggested by existing literature. Transmission of information for four phonetic features was also analyzed. Lipreading performance was nearly perfect for/p/,/f7,/w/,/Θ/and/u/. Lipreading performance on/t/,/k/,/t∫/,/∫/,/s/,/i/and/æ/depended on context. The features labial, rounded, and alveolar or palatal place of articulation were found to transmit more information to lipreaders than did the feature continuant. Variability in articulatory parameters resulting from coarticulatory effects appears to increase overall lipreading difficulty.

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