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by arthurofbabylon 2805 days ago
Most of us echolocate already, oftentimes without even knowing it.

An exercise to test/prove existing echolocation abilities: Stand 10 meters from a wall. Close your eyes and walk towards it. Try to stop right in front of the wall without opening the eyes. The majority of participants will stop when the wall is 1/5 meter in front of the face. Participants report “hearing” the wall.

Broadly speaking, listening is the human means for becoming aware of physical threats. Even unconsciously heard sounds will trigger stress hormones.