[Riley]

‘MARCO!’

[MyTwoCopperCoins]

[counterpunch]

There are some blind people who use echo location with amazing accuracy.

[Grizzled Bear]

I'd imagine that if a blind, circus performer developed this talent he'd be quite a Daredevil.

[Wiseghy]

So where is the pic of that blind super-dude played by Ben Afflack?

[TXnMA]

I've navigated in the dark by doing this, and it works -- especially in acoustically "live" spaces (with not a lot of sound absorbers). You can also do it with hand claps or finger snaps -- especially with your hand held above and behind your head.

I'd expect that someone who didn't trash their hearing with lots of shooting without hearing protection as a youngster (as I did) could do it quite effectively. The echolocation depends mostly on high frequencies -- which shooting damage devastates... :-(

Advice to young shooters:

• Just because you're young, you (especialy your ears) are not invincible.

• That ringing in your ears is not funny; it is proof your ears are being damaged.

• If you want that ringing (tinnitus) there 24/7, (as I do) -- keep shooting without protection.

• Foam ear plugs are dirt cheap. Learn how to insert them -- and use them.

• I now use foam plugs -- with "earmuff" sound protectors over them -- even when operating the mower, tractor, etc. -- now that it is mostly too late... :-(

• Double protection is a great idea -- especially for young shooters. ("Muffs can become displaced or "leak" sound...)

What!?!??? Say again!?!???

[Vaduz]

Politicians have been using it for years.

[Buckeye Battle Cry]

Perhaps this is true, but then we’d all have to develop foreheads like Paul Begala. I’ll pass.