“If you’d push the hair out of your eyes, you could hear me
better” makes perfect sense. It belongs with the saying, “I can’t
hear you, I haven’t got my glasses on.” The reason is that many of us unconsciously pick up information from watching the speaker, not always as obviously as lip reading.

The MCGURK EFFECT is named after Harry McGurk, a
developmental psychologist at the University of Surrey; examples
are on record from 1973.

(Thanks to http://www.worldwidewords.org/ – visit and subscribe. You’re welcome.)

Topics: English, words, psychology, psycholinguistics, the mcgurk effect