We all know the routine with super powers: a mutated gene, alien origin, or a magic object are required, and usually some cataclysmic family event for motivation. Matt Murdock, better known as Daredevil (and hopefully never again known as Ben Affleck), lost his sight to an accident with a truck carrying radioactive muck. The incident heightened the rest of his senses, which allowed him to use a small radar device and super hearing to allow him to "see." But guess what? We don't need a tiny radar, super senses, or even a death in the family to see with sound. We normals can do it already.
How, you may ask? Pretty much just like Daredevil (or bats, or dolphins) do, by bouncing sounds off the environment and listening for the echoes. Blind people have been doing something similar to this instinctively, usually describing how they can "feel" a nearby obstruction ...
