The study to estimate the learning stage of pronunciation for the hearing impaired student from acoustic parameters of speech

从语音声学参数估计听障学生发音学习阶段的研究

• 批准号: 10680236
• 负责人: AOYAMA Kensei
• 金额: $ 1.92万
• 依托单位: Tsukuba College of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10680236/
• 关键词: hearing impaired student; intelligibility of speech; learning stage of pronunciation; sound parameter; 母音音響特徴量; F_1・F_2平面; 母音間距離; 音声の特徴量; 発音評価; 音節明瞭度

The intelligibility of syllable speech indicates the learning stage of pronunciation. But, the intelligibility of syllable speech is measured with exceeding labor, and then that result can vary according to the hearing test person, too. So, it was tried to estimate learning stage of pronunciation from acoustic parameters of speech. As a result of studying the intelligibility of speech pronounced by forty students of Tsukuba College of Technology, it was seen that there was good correlation between the intelligibility of syllable speech and intelligibility of vowels. Therefore, it was tried to find the intelligibility of vowels from the sound parameter that it was extracted from the vowel sound. Those parameters are the first and the second formant frequency (FィイD21ィエD2 and FィイD22ィエD2). The distance between /a/ and /e/, between /e/ and /I/, between /I/ and /u/, and between /u/ and /o/ in the plane with the FィイD21ィエD2-axe and FィイD22ィエD2-axe was summed. Then, the relationship between the intelligibility of vowels and that distance in total was investigated. As the result, it was found out that there was correlation in that distance in total and the intelligibility of vowels. And it was seen that distance between each vowel pronounced hearing impaired subjects and one pronounced by normal subjects was closely connected with the intelligibility of vowels. Therefore, it is clear that the learning stage of pronunciation is estimated from that sound parameter of vowels.

音节语音的可理解性标志着语音的学习阶段。但是，音节语音的可理解性是用超量劳动来测量的，然后结果也会根据听力测试者的不同而有所不同。因此，我们尝试从语音的声学参数来估计语音的学习阶段。通过对筑波工学院40名学生语音的可理解性进行研究，发现音节语音的可理解性与元音语音的可理解性之间存在着良好的相关性。因此，试图从从元音语音中提取的语音参数中寻找元音的可理解性。这些参数分别是第一和第二形成频率（F D21 D2和F D22 D2）。对/a/与/e/之间、/e/与/I/之间、/I/与/u/之间、/u/与/o/与F D21 D2-axe和F D22 D2-axe平面上的距离求和。然后，研究了元音的可理解性与总距离之间的关系。结果发现，总距离与元音的可理解性之间存在相关性。结果表明，听力受损受试者所发元音与正常受试者所发元音的距离与元音的可理解性密切相关。因此，很明显，发音的学习阶段是由元音的声音参数来估计的。