HyperSonic Sound device on eBay

We've heard a lot over the last two years about HyperSonic Sound, a cool system for focusing audio and "beaming" it directly at someone, sort of like a spotlight for sound. (Link to Mark's 2003 post about a New York Times article profiling the inventor. Link to 2003 Popular Science article.) Someone is now auctioning … Continue reading HyperSonic Sound device on eBay