Benguerel A P, Pichora-Fuller M K
J Speech Hear Res. 1982 Dec;25(4):600-7. doi: 10.1044/jshr.2504.600.
Normal-hearing and hearing-impaired subjects with good lipreading skills lipread videotaped material under visual-only conditions. V1CV2 utterances were used where V could be /i/, /ae/ or /u/ and C could be /p/, /t/, /k/, /ch/, /f/, /theta/, /sh/, /sh/ 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/, /f/, /w/, /theta/ and /u/. Lipreading performance on /t/, /k/, /ch/, /s/, /i/ and /ae/ 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.
听力正常且具备良好唇读能力的听力受损受试者在仅视觉条件下对录像材料进行唇读。使用了V1CV2发音，其中V可以是/i/、/æ/或/u/，C可以是/p/、/t/、/k/、/ch/、/f/、/θ/、/ʃ/或/w/。这些刺激中存在协同发音效应。分析了语音语境对每个V和C的唇读分数的影响，以解释现有文献中所表明的音素视觉感知中的一些变异性。还分析了四种语音特征的信息传递情况。对于/p/、/f/、/w/、/θ/和/u/，唇读表现几乎完美。/t/、/k/、/ch/、/s/、/i/和/æ/的唇读表现取决于语境。研究发现，与延续音特征相比，唇音、圆唇音以及齿龈或腭部发音部位的特征能向唇读者传递更多信息。协同发音效应导致的发音参数变异性似乎增加了整体唇读难度。
