Longitudinal study of Prosodic Characteristics in the child with Profound hearing impairments : An Investigation Using Speech rate and Pitch

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  • <研究論文>重度聴覚障害児の発話の韻律的特徴に関する縦断的研究 : 発話速度とピッチを指標として
  • 重度聴覚障害児の発話の韻律的特徴に関する縦断的研究 : 発話速度とピッチを指標として
  • ジュウド チョウカク ショウガイジ ノ ハツワ ノ インリツテキ トクチョウ ニ カンスル ジュウダンテキ ケンキュウ : ハツワ ソクド ト ピッチ オ シヒョウ ト シテ

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The purpose of this paper is to carry out continuous research on changes in the prosodic characteristics of the speech of children with profound hearing impairments, including pitch and speech rate. For this paper, we had a child with profound hearing impairment pronounce certain syllables at three different points in her development: third year of elementary school, sixth year of elementary school, and third year of high school, at which time we acoustically measured the speed of her speech and pitch. We identified an increase in speech rate at the third year high school phase compared to the third year elementary school phase. However, the speech rate had dropped by the time the child was in the sixth grade compared to the time they were in the third grade. The reasons for this are as follows: (1) the child was thinking hard as she read the text, and (2) she attempted to read the text clearly, the result was slow reading. In addition, pitch declined as the child grew older, such that her pitch approximated that of a girl of normal hearing by the time she was a third year high school student.

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