Voice-onset Time

噪音起始时间

A term used in phonetics, referring to the point in time at which vocal-fold vibration starts, in relation to the release of closure. In a fully voiced plosive, for example, the vocal folds vibrate throughout; in a voiceless unaspirated plosive, there is a delay (or lag) before voicing starts; in a voiceless aspirated plosive, the delay is much longer, depending on the amount of aspiration. The amount of the delay, in relation to the types of plosives, varies from language to language.

嗓音起始时间是语音学术语，指继闭塞开放后声带开始振动的时点。例如一个完全带声的破裂音，声带自始至终振动；一个不带声的不送气破裂音，带声开始前有一延迟（或时延）；一个不带声的送气破裂音，时延要长得多，取决于送气的量。各种类型的破裂音时延的长短随不同语言而异。