Echolocation acts as substitute sense for blind people

So... does this mean that blind people can call themselves "batman" and "batgirl"? Probably not, but it's neat how (at least some) humans can use the same techniques.

“Some blind people use echolocation to assess their environment and find their way around,” said Buckingham. “They will either snap their fingers or click their tongue to bounce sound waves off objects, a skill often associated with bats, which use echolocation when flying. However, we don’t yet understand how much echolocation in humans has in common with how a sighted individual would use their vision.”
— http://www.sciencecodex.com/echolocation_acts_as_substitute_sense_for_blind_people-148061