A Kazakh start-up helps the blind – through echolocation
A Kazakh start-up helps the blind – through echolocation Galimzhan Gabdreshov testing his non-intrusive echolocation system for visually impaired people. Photo courtesy of Galimzhan Gabdreshov. Although bats can see, many species have evolved an unusual way to fly and hunt in the dark—echolocation. To do so, they emit ultrasonic sound waves that bounce off objects and navigate using the resulting echoes. Dolphins use a similar technique. Can this technique be used by people without sight? An innovative start-up in Kazakhstan, Sezual, has developed echolocation for human beings, with su...