Scientists at ETH Zurich and the Swiss Federal Institute of Technology Lausanne have developed a device that directs sound waves in one direction without wasting energy. This breakthrough sound wave ...

They don't hear anything. Nothing, nothing. I don't hear anything. And I'm supposed to have very good hearing. Today we field tested the new ringtone, downloaded the sound onto the cell phone, and hit ...

A new ringtone tested in 2006 revealed only kids could hear its high-pitched sound, leaving adults baffled. A new ringtone tested in 2006 revealed only kids could hear its high-pitched sound, leaving ...