3d data of the surroundings could be also obtained with a portable sound-to-3d sonar system.. not sure if such exists yet but it would be a cool thing to connect to your device for enhanced bat-sight.
I saw this documentary once about a man who was half bat, half man. He implemented something like this using mobile phones in the area he wanted to look at.
I think he must not have gotten the sonar parts in his half bat bits.
I think he must not have gotten the sonar parts in his half bat bits.