What is a voice bar?
For what sounds is there a voice bar?
Why does the voice bar disappear during a final /z/?
Why is the final sound of 'days' classified as /z/ and not as /s/?
What is the real difference between /d/ and /t/?
How does aspiration show up on a spectrogram?
What does VOT stand for?
Give a definition of VOT.
What are typical values for the VOT of /t/ in English?