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Re: Implicit human echolocation
The phenomenon is known as facial vision. Dr. Lawrence Scadden could
do it well enough to ride a bicycle in traffic despite his total
blindness. He was a participant in at least one published study.
Most people who use it use passive echolocation as schools for the
blind discouraged their students in the past from making echolocation
sounds. Humans can also use active echolocation, but not with the
range accuracy of bats. I've used passive echolocation. Sighted
humans are about as accurate as bats in azimuth and elevation.
It's effortful. Once you've memorised your environment, you prefer to
operate by dead reckoning, which means you don't notice changes
unless they're obvious. This phenomenon is also seen in bats and
rodents, and Don Griffin discussed it in Listening in the Dark.
Harry Erwin, PhD, Senior Lecturer of Computing, University of
Sunderland. Computational neuroethologist: