Wow. This is going to make watching sports on TV a whole lot more intimate. The AudioScope can zoom in on sound and pick out a single voice in a mob of people.

So we can now hear what the coach is saying, or get the reaction of a player to his winning move.

The AudioScope works by using an array of 300 individual mics and a camera with a wide angle lens. The camera helps the system estimate distances, which allows it to precisely time when sounds should arrive at each microphone.
The down side? Goodbye privacy.