Nicolaidis Katerina, Sfakianaki Anna
a Department of Theoretical and Applied Linguistics , School of English, Aristotle University of Thessaloniki , Thessaloniki , Greece.
Int J Speech Lang Pathol. 2016 Aug;18(4):388-401. doi: 10.3109/17549507.2016.1151934. Epub 2016 Apr 6.
The present paper examines the influence of stress and context on selected acoustic characteristics of vowels produced by six adult Greek intelligible speakers with profound hearing impairment and six speakers with normal hearing (three males and three females in each group).
F1, F2 and F3 formant frequencies and the duration of vowels are measured in words of the form /(')pVCV/ with V = /i, ɛ, ɐ, ɔ, u/ and C = /p, t, k, s/. Variation in these parameters due to context and stress is reported for the two genders. A co-articulatory measure and three measures that examine the area of the vowel space and differences along the F1 and F2 axes are calculated.
The results show a reduction of the vowel space in the unstressed condition for both groups, while vowel duration was found to be significantly longer in this condition for the speakers with hearing impairment. In addition, smaller C-to-V carryover co-articulatory effects were found for the speakers with hearing impairment.
Findings are discussed within the framework of perceptual and production constraints in hearing impairment and with reference to current models of co-articulation.
本文考察了压力和语境对六名成年希腊语发音清晰的重度听力障碍者以及六名听力正常者（每组三名男性和三名女性）所发元音的特定声学特征的影响。
在/(')pVCV/形式的单词中测量F1、F2和F3共振峰频率以及元音时长，其中V = /i, ɛ, ɐ, ɔ, u/，C = /p, t, k, s/。报告了这两个性别因语境和压力导致的这些参数的变化情况。计算了一个协同发音测量指标以及三个考察元音空间面积和沿F1和F2轴差异的测量指标。
结果显示，两组在非重读音节条件下元音空间均减小，而在该条件下，听力障碍者的元音时长显著更长。此外，还发现听力障碍者的C到V的协同发音效应更小。
研究结果在听力障碍的感知和发音限制框架内进行了讨论，并参考了当前的协同发音模型。
