A Soundless Sound System

Elwood "Woody" Norris pointed a metal frequency emitter at one of perhaps 30 people who had come to see his invention. The emitter -- an aluminum square -- was hooked up by a wire to a CD player. Norris switched on the CD player. "There's no speaker, but when I point this pad at you, you will hear the waterfall," said the 63-year-old Californian. And one by one, each person in the audience did, and smiled widely. Norris' HyperSonic Sound system has won him an award coveted by inventors -- the $500,000 annual Lemelson-MIT Prize. It works by sending a focused beam of sound above the range of human hearing. When it lands on you, it seems like sound is coming from inside your head...

One use for this technology I haven't seen discussed is telephonic. In a car or on a plane, wouldn't it be nice to talk quietly into a directional microphone while listening to a caller? While handling absolutely no equipment?

Inventor creates Soundless Sound System