Microphones are already quite good. If you can be seen, you can be "heard". That has been true for many years. I think there was a scene in the movie Enemy of t

Microphones are already quite good. If you can be seen, you can be "heard". That has been true for many years. I think there was a scene in the movie Enemy of the State involving cone mics. The difference with this technology is that someone can "hear" you even if you're around a corner.