Gibbon Fiona E, Lee Alice, Yuen Ivan
University College Cork, Ireland.
Cleft Palate Craniofac J. 2010 Jul;47(4):405-12. doi: 10.1597/09-067.1.
Previous research using electropalatography has revealed that high vowels are vulnerable to articulation errors in cleft palate speech. The error involves complete tongue-palate contact, which obstructs normal airflow through the mouth and increases nasal airflow. This study used electropalatography to provide a more detailed description of typical tongue-palate contact for high vowels than currently exists.
Electropalatography and acoustic data were recorded for multiple repetitions of monophthongs /i/, /u/, and /a/ and diphthongs /ai/, /oi/, and /au/.
Ten typical English-speaking adults.
Two measures were taken from electropalatography data during vowels; one identified electropalatography patterns with complete tongue-palate contact and a second calculated percentage of contact at five time points.
None of the vowels had electropalatography patterns with complete tongue-palate contact. The amount of contact varied for the different vowels at the five time points throughout the vowels and also between speakers. When contact occurred, it was located in the posterior, lateral regions of the palate, forming a central groove that was free of contact.
Complete tongue-palate contact during vowels is not a feature of typical English speech and can be considered an error pattern. The normative date provided in this study will be useful to speech-language pathologists who use electropalatography in their clinical work. The implications of the findings are discussed in relation to the assessment of vowels in cleft palate speech.
以往使用腭电图的研究表明,高元音在腭裂语音中容易出现发音错误。这种错误涉及舌头与腭完全接触,这会阻碍正常的口腔气流并增加鼻腔气流。本研究使用腭电图对高元音的典型舌腭接触进行比现有描述更详细的描述。
记录了单元音/i/、/u/和/a/以及双元音/ai/、/oi/和/au/多次重复发音时的腭电图和声学数据。
10名以英语为母语的典型成年人。
从元音发音时的腭电图数据中获取两项测量结果;一项用于识别舌头与腭完全接触的腭电图模式,另一项用于计算五个时间点的接触百分比。
没有一个元音呈现出舌头与腭完全接触的腭电图模式。在整个元音发音过程中的五个时间点,不同元音的接触量各不相同,而且在不同说话者之间也存在差异。当出现接触时,接触部位位于腭部的后部、外侧区域,形成一条无接触的中央凹槽。
元音发音时舌头与腭完全接触并非典型英语语音的特征,可被视为一种错误模式。本研究提供的规范数据将对在临床工作中使用腭电图的言语语言病理学家有所帮助。研究结果的意义将结合腭裂语音中元音的评估进行讨论。