Blind Boy Masters Echolocation

This is an amazing video about a blind boy who has mastered echolocation so well that he can walk down the street, rollerskate, and play video games -- all unassisted.

More like this

tags: Eclectus parrot, Eclectus roratus,
Not that one. This one. (Complete with vide
Anything missing from this link? Thank you all for suggestions so far. I have updated the previous posts a couple of times already and now have a backlog so will have to update them all soon again.
The other day I found and photographed another tree house ruin.

But seriously, cool story. Also, what a fantastic mother that kid has! The video was well-done.

Have any serious scientific studies been done with him, looking at the frequency range of those clicks, or his ability to distinguish between materials objects are composed of?