Designed to improve your ability to alter your perception.
For a different take on the exercise check out Shadow Play.
Close your eyes. Listen to the sounds around you, forgetting what they represent. Be conscious only of the cast rhythm they create. Even in the city, forget that the whooshes, thumps, clacks, chirrupings, rumbles, and bangs are passing cars, workmen’s hammers, footsteps, sparrows, trucks, and slamming doors – hear only the intricate, organic pattern in which each is a separate beat.
Exercise courtesy of The Spiral Dance by Starhawk