语音学上,擦音(或摩擦音,fricative consonant)是辅音的一种发音方法。发音时,兩個發音器官彼此靠攏,形成狹窄的通道,气流通过时造成湍流发生摩擦,发出噪音。与塞音不同,擦音可以持续一段时间。

擦音下另有一類有噝擦音,發音時除了氣流在窄道間摩擦外,舌頭拉長,將氣流帶到牙齒的尖處造成更高頻率的湍流。

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