A 6th sense for blind people

pulsera-app

A wristband called Sunu emits a high-frequency sound wave that bounces off objects as far as 14 feet in front before registering as a gentle, pulsing vibration. The closer the object is — whether it’s a wall, trash can or person — the more frequent the pulses become, allowing blind people to create a mental map of the world around them using echolocation. It’s like the sonar device being used in vehicles to sense nearby objects and avoid crashes.
https://www.washingtonpost.com/news/innovations/wp/2017/10/27/for-decades-the-blind-have-used-canes-to-get-around-now-an-special-wrist-band-helps-them-locate-hazards/?

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