The Sounds of Silence

An inventor has developed a way to transmit sounds silently in a narrow beam:

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.

Norris said the uses for the technology could come in handy ?

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