
The man in the photo above is Daniel Kish. Daniel Kish enjoys, among other things, biking, hiking, roller-skating, playing basketball, and skateboarding in Orange County, California. Except there's one catch- he's blind.
At the age of 4 months, Kish was diagnosed with retinoblastoma in both eyes. Retinoblastomas are cancerous tumors of the retina that are potemtially fatal. Treatment usually requires removal of the entire eye. One of Kish's eyes was removed at 7 months, the other at 13 months. Up until that point the blastomas were so large that it was unlikely Kish could visually discriminate anything other than light from dark. Kish was always blind.
After the removal of Kish's eyes, his parents didn't attempt to make the world any less real for him; they knew he was blind and they were going to help him live with that. Despite bumps and bruises, they did not restrict his activity. They also did not act as guides- they let him experience the world on his own.
His parents claim that the clicking began before his eyes were even removed. Now, before I continue, it's time we had a quick science review. It's a common fact that bats use high pitched sounds and clicks to see where they're going at night. I hope you see where I'm going with this...
He used this clicking early on to guide his crawling, cruising, and early walking. Daniel Kish can see with his ears.
Today, he guides tours with his friend Brian Bushway. These tours usually involve mountain biking with blind people. Their tours inspire confidence and self-esteem in blind people of all ages. They also tour and teach their mutual skill, human echolocation, to the masses.
The media, unfortunately, calls this skill a "medical mystery", or "special gift". Quite on the contrary, human echolocation is very human indeed. You can do it. Oh yes you can.
Kish's 'refined' echolocation allows him to do all the above activities with ease. When asked by a person with normal vision as to 'what' he sees on his bike rides, his reply was, "I can hear the sides of the trail where the brush meets the dirt. I can also hear if there are big rocks or trees in or near the path. All the important stuff about the trail..." Another favorite past time of Daniel Kish is camping and nighttime walks through the woods. Especially courageous 'normal-seeing' friends sometimes turn out their lights and allow Kish to lead them on the trail without a stumble.
So how does Daniel utilize clicks in a way that let him perceive objects down to the material they're made from? It's actually quite simple. Do begin, make a 'shhhh' noise while you move your palm back and forth from your mouth. The sound should change as your hand's distance changes. What happens is the sound waves collide with your hand. This 'sonar interference' changes depending on how far the interfering object is from the sound source. This effect is not an illusion that just occurs in the said example (unless you start thinking philosophically. Everything's an illusion, then. Wake up and smell the spiritual existence, friends. WE DON'T EXIST. Anyways.). The same thing will happen if you move a book in front of a speaker.
Well that's all interesting, but let's make it practical. Substitute now your palm for a wall. Find a wall in your home where you'll have 10 feet of clearance and no tapestries or paintings nearby. Position your face some 1 foot away from the wall. Close your eyes and start making the 'shhhhh' noise. Bob your head back and forth so you can hear the whooshing interference. As you continue making the noise, move progressively away from the wall and then move back closer. Eventually you should feel the wall more than hear it. Continue moving back and forth. You should 'feel' the wall when you get closer.
Next, stop making the 'shhhhhhh' noise and walk six or seven paces from the wall. Turn, with you eyes closed, to the wall. Start making 'sh-sh-sh-sh' noises while slowly walking towards the wall. When you feel you're getting close to the wall, concentrate hard and move slowly. When you feel yourself 1 foot from the wall, open your eyes. Keep doing that until the wall is visible through sound in your mind rather than through vision. Once you're good, research it some more and become a bat. Then you can build a cave, get a badass car, and hunt clowns. Only a suggestion.
Feo P-S
P.S.
If you did find this interesting, check out See What I'm Saying: The Extraordinary Powers of Our Five Senses by Lawrence D. Rosenblum, the source material for this article.