文章発音における歯列を含むダイナミックパラトグラフィー

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  • Dynamic Palatography Including Dental Arch in Sentence.

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Dynamic palatography was used to identify contact patterns of tongue-to-palate and tongue-toteeth movements in 18 dentulous adults (11 males and 7 females) during the production of the following sentence:[sakura-no-hana-ga-sakima ∫ita].<BR>The palatography sensor of thin film type with 96 electrode arrays (KAY: model 6300) covered the subject's palate and maxillary teeth. Real-time recording of speech sound waves and tongue-to-sensor touch signals were taken simultaneously. Then, speech sound waves, spectrum, and palatogram were simultaneously displayed on the CSL (Computerized speech lab, Model 4300 B) so that the relationship between speech sound analysis and movement of the tongue could be easily observed.<BR>The results showed that the tongue-to-teeth contact area of each sound differed from the others. However, its range was confined within the cervical half of lingual surface of incisors and the lingual cusps of the molars. When the contact patterns of this dynamic palatograms were compared with the contact patterns of static palatograms, the maximum contact pattern of [s, k, ∫, and t] sounds was found to be quite similar. However, a slight difference was noted between the dynamic and static palatograms for [r] and [n] sounds. The duration of the articulatory activity for the initial [s] in the sentence was significantly longer than that in the middle of the sentence (p<0.01). The maximum contact area for [lc] in [ki] was significantly larger than that in [ku](p<0.01).

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