Bub
n0rd
<In voice of Morbo from Futurama>
McGurk Effect is proof that you pitiful humans can not be trusted in what you perceive!!
Hahahahaha!!
</In voice of Morbo from Futurama>
That particular example is bogus. It is impossible to pronounce a B sound with your teeth on your lip the way he was doing. It's more likely it was a test to make people think they heard the same thing even though it was different.
Bub - I think you missed what they were doing. they didn't say that he was actually saying "BAH" with the teeth and lip positioned for the "FAH" sound. what he's saying in the "FAH" position is irrelevant except for the VISUAL portion of it. the visual "FAH" against the audible "BAH" makes us "hear" "FAH".