The tympanograms are normal. 45 ears lost acoustic reflex. 1 ear increased acoustic reflex threshold.

声导抗鼓室图全部正常，45耳镫骨肌反射消失，仅1耳引出且反射阈升高。

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Result: Pure tone and ABR waveforms were abnormal in 20 subjects (21 ears), moreover acoustic stapedius reflex and the vestibular function were abnormal in 19 subjects.

结果：20例(21耳)纯音测听、听觉诱发电位均异常，19例镫骨肌声反射及前庭功能异常。

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