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A comment on A technique that enables people to hear ultrasonic sources above 20kHz.
There might be blind people who orient themselves by echolocation - maybe not ultrasonic but still pretty cool
https://www.discovermagazine.com/mind/the-blind-individuals-...
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There might be blind people who orient themselves by echolocation - maybe not ultrasonic but still pretty cool
https://www.discovermagazine.com/mind/the-blind-individuals-...