Objective To investigate the vowel's nasalance and contact quotient (CQ) in children with hearing loss. Methods 57 subjects were divided to 3 groups: profound hearing loss children with hearing aids (HA, n=19), profound hearing loss children with cochlear im-plant (CI, n=19) and children without hearing loss (n=19). With the help of NV and electroglottography (EGG), the subjects' nasalance and CQ were recorded when they said/a/,/æ/,/i/,/o/,/u/. Results There was no significant differences among the 3 groups on nasalance (P>0.05). There was significant difference among 5 vowels on nasalance, ranked as/u/,/o/,/æ/,/i/, and/a/(P<0.001). There was significant dif-ference among 3 groups on CQ, ranked as HA, normal, and CI group (P<0.001). There was significant difference on CQ among 5 vowels, ranked as /i/,/u/,/æ/,/o/, and/a/ (P<0.001). Conclusion The voice and resonance should be assessed before speech therapy, which the speech therapy starts from the most correct vowel for children with profound hearing loss.% 目的考查不同元音材料对听力障碍儿童鼻流量和接触率的影响。方法对19名佩戴助听器的重度听力障碍儿童、19名植入人工耳蜗的重度听力障碍儿童和19名正常儿童进行鼻流量和接触率测定。结果三组儿童的鼻流量无显著性差异(P>0.05)。不同元音的鼻流量平均值从大到小依次为：/u/、/o/、/æ/、/i/和/a/(P<0.001)。助听器组接触率最高，正常儿童次之，人工耳蜗组最低。不同元音的接触率平均值从大到小依次为/i/、/u/、/æ/、/o/和/a/。结论在进行言语矫治之前，要对听障儿童的共鸣障碍和嗓音障碍进行评估；言语矫治应从儿童容易掌握的元音开始。
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