2019-03-06 06:14:24

THERE’S more to ventriloquism than keeping your lips shut. The secret, says Jean Vroomen, is to distract the audience with well-timed dummy movements. Vroomen and his team at Tilburg University in the Netherlands and at the Free University of Brussels say this exploits a reflex brain reaction, where we think a sound comes from a source of movement. In an experiment to mimic the effect, they played a noise directly in front of a volunteer while a flash of light appeared from the side. Most subjects thought the sound came from the direction of the light (Acta Psychologica, vol 108,