3 ms·

This is called sonar... it has been around for a very long time.

• dahart 7y ago
  > This is called sonar... it has been around for a very long time. You’re thinking of direct line-of-sight detection of objects. This paper is seeing around corners things that aren’t directly visible to the sound sources, it’s a very different thing that requires a big computer and a reconstruction phase.
  • amelius 7y ago
    They're using a wall as a mirror ... it's not that much different from direct line-of-sight sonar if you ask me. Just flip the scene across the mirror (virtual image), and you're back at plain old sonar.
    • MobileVet 7y ago
      Agreed. Light, sound and RF all bounce off walls. Yes it takes some more computation to figure it out, but at the end of the day you are plotting the rebound of sound off of an object. Sonar
• amelius 7y ago
  Except that in typical sonar applications reflections are seen as an inconvenience, rather than as something useful.
  • stronglikedan 7y ago
    "Sonar 2.0"