咽腔是发声的共鸣腔，腭与舌又是协助发声的器官，对声音的清晰度和音质特色有极为重要的关系。如有缺陷和病变时，所发出的声音或是含糊不清（语言清晰度极差），或是音质特色和原来不一样（音色改变），称为声音异常。
n. heterophony
misc. cacophonia
下午2点，他被一阵异常的声响吵醒，这声音并非来自他的羊群。
He was awakened at 2 pm by an unusual sound that was not coming from his sheep.
“我拔不出来了！”我喊道，我的声音在这个封闭的空间里听起来异常响亮。
"I can't get it out!" I shouted, my voice sounding unnaturally loud in the enclosed space.
基本上， McLeish左耳骨头的缺失部分让上半规管对声音和压力做出了异常反应。
Essentially, the missing piece of bone in McLeish's left ear was allowing the superior semicircular canal to respond to sound and pressure in abnormal ways.
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