See For Yourself - Purves Lab's optical illusions web page with empirical explanations of familiar and unfamiliar illusions.
posted on Nov 16, 2007 - View this thread

27-year-old professional recorder player can not only see colours when hearing music but can taste musical notes (see chart for details). More on synaesthesia, which has appeared here, here and here. [courtesy of CBC]
posted on Mar 3, 2005 - View this thread

Dr Hugo's Museum of the Mind - Synaesthesia
posted on Jan 20, 2005 - View this thread

Seeing with sound.
A researcher in the Netherlands has developed a system that converts pictures from a head-mounted camera into highly complex soundscapes, which are then piped to the user via headphones. After only a week of use, a woman who has been blind from birth can tell a CD from a floppy, and discern whether the lights are on or off. Not quite up to either a bat and/or Daredevil standards, but very cool nonetheless.
posted on Oct 14, 2003 - View this thread