Make a video with unsynchronized sound and image. It's easy to tell the sound is unsynchronized by watching someone speaking. In fact, it's quite annoying to watch.

But if the image focused on someone who is listening, could you also tell the asynchrony? From my experience, I think so. Alex Ramonsky has told me that we make micromovements whenever we hear something, even if we are trying not to listen.

Can anyone find a good presentation of this phenomenon?

None of the below are very satisfactory:

http://www.physicsforums.com/archive/t-18967_The_bodily_basis_of_thought.html

http://www.google.com/search?hl=en&q=condon+and+sander

Neonate movement is synchronized with adult speech: interactional participation and language acquisition

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http://www.google.com/search?hl=en&q=solfege+cognition

Elaine Chew - Modeling Tonality: Applications to Music Cognition has a key-finding algorithm. I've wanted to find such an algorithm myself.

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