Basketball for the Blind From: NASA Tech Briefs Insider - 06/06/2005 Engineering undergraduates from Johns Hopkins University have designed and built a system that uses sound emitters in the ball and on the backboard to enable blind people to play basketball. In the system, a large piezoelectric sound emitter powered by a 9-volt battery and mounted behind the backboard sends out low pulse tones to help players locate their shooting target. A remote control is used to turn it on and off. A smaller sound emitter, embedded in the basketball and powered by five 3-volt button batteries, sends out a higher continuous tone to tell players where the ball is. For more information, visit: http://www.jhu.edu/~news_info/news/home05/may05/bball.html Links: Blind Industries and Services of Maryland http://bism.org/ Johns Hopkins Department of Mechanical Engineering http://www.me.jhu.edu/ Johns Hopkins women's basketball http://hopkinssports.collegesports.com/sports/w-baskbl/jhop-w-baskbl-body.html Spalding Infusion basketball http://www.spalding.com/infusion/index.php