Voice Onset Time (VOT)

• Duration of the closure-release cycle for the stop indicated through the regular segment boundaries within the IPA Actual: Phone tier.

• Voicing tier required in TextGrid to indicate voicing. This tier must be a point tier (default name: 'Voicing').

A TextGrid must be assigned to the session and tier mappings setup for the Phon tier (default 'IPA Actual') used in the query. A point tier (default name 'Voicing') must exist, with a point for each interval for which VOT calculation will be performed. The point should be have the same label as the interval to which it is related not including stress markers.

Example:

Given a TextGrid interval "T" and a TextGrid point (i.e., voicing) "P", VOT is calculated as:

• VOT = P - T.end

In the example above, k has a positive VOT (onset of voicing after release), while b has a negative VOT (onset of voicing before release).

The table produced will have the following columns:

• Session

• Speaker

• Age

• Record #

• Orthography

• IPA Target

• IPA Actual

• Result/Tier name(s)

• Start Time(s)

• End Time(s)

• Release(s)

• Dur + VOT(s)

• VOT(s)