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Voice Onset TimeIn phonetics, voice onset time, commonly abbreviated VOT, is the length of time that passes betwen when a stop consonant is released and when voicing, vibration of the vocal cords, begins. The three major phonation types of stops can be analyzed in terms of their voice onset time. Voiceless stops have a voice onset time of zero, meaning that voicing begins as soon as the stop is released. aspirated stops have a voice onset time greater than zero. The period between the release of the stop and the onset of voicing is what constitutes the aspiration. Voiced stops have a voice onset time of less than zero, meaning the vocal cords have started vibrating before the stop is released.
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