I should add that ---- means the mouth or larynx is open, and
that considerable VOT differences are perceived only as
differences of care in pronunciation (more aspirated t with
later VOT, more fully voiced b with earlier VOT), differences
of emphasis or stress, or toward the extreme differences in
dialect or accent. VOT of both voiced and voiceless stops is
earlier for e.g. Spanish /t/ and /d/.
Bruce
bn@bbn.com