LONDON, March 2 — A study of Durham University in Britain has
found the skill of echolocation can help blind people navigate by “seeing
with sound” just like bats.
The insights were published in the British Royal Society journal
Proceedings B on Wednesday. They confirmed that people can identify objects
with a high rate of accuracy by listening to echoes of mouth
clicks.”Everyone’s clicks are different,” explained Daniel Kish, a
co-author on this study, who is also an American echolocation expert.H The
research team used a special sound-deadening room to put echolocating
volunteers to the test. The result showed that echolocators could spot the
target in front of them after a click or two.But if it was off to the side
or behind them, they needed about 10 or 12 clicks, and the clicks became
much louder. Expert echolocators can make subtle alterations to their
clicking patterns depending on the object’s location.
“Click energy is very much to the front of the person, with very little
going to the back. So I think people are compensating, or double-checking
by sending more sound behind them,” said Lore Thaler, who led the study.
She also said that from a scientific perspective, it’s firmly established
that people can do this like bats.Recent research has shown that
echolocation can provide details about objects in the environment,
including shape, size, distance, and even the material they are made
from.Andrew Kolarik from the University of Cambridge told BBC News that
each echolocation click is like a single snapshot of the world, so teaching
echolocation skills could provide blind people with the means of exploring
new places. – XINHUA
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