3D Sound?

Here's a story about virtual reality with 3D Audio.  This professor has found the musical sweet spot for sound.  Think of the potential application in hearing aids or Cochlear Implants.  

"Surround-sound can give you a sense of an explosion happening at a distance, but it's not accurate," says Professor Choueiri, sitting in his custom-built acoustics lab on campus.  "With 3D audio, I can get a fly to go around your head… or if you want to really scare somebody, you can put a sound inside their head."