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元音发音的准确与否直接影响构音的清晰度。对 11名构音障碍儿童的构音样本分析发现 ,元音发音的偏误率非常高 ,且具有共同性特征 :即元音弱化。具体表现为紧元音央化或元音脱落。造成元音弱化的主要原因有三 :部分儿童对区别性特征小的元音不能准确听辨 ;构音障碍儿童发音时的气流量不足 ,难以形成对声带震动所需的压力 ;构音器官的紧张度不够 ,造成喉、唇、舌、腭的发音松懈。
The accuracy of vowel pronunciation directly affects the clarity of articulation. The analysis of the consonant samples of 11 dysarthric children found that the error rate of pronunciation of vowels is very high and has the common feature of vowel weakening. The specific performance of the tight yuan yuanyin or vowel fall off. There are three main reasons for the weakening of the vowel: some children can not accurately recognize vowels with small distinctive features; children with dysarthria have insufficient airflow during vocalization, which makes it difficult to form the pressure needed to vibrate the vocal cords; Degree is not enough, resulting in laryngeal, lips, tongue, palatal sound loose.