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There are some threats which are very deadly, but we can't sense them, like radiation. Electronic sensors can feel those threats.
The suit has small robotic arms packaged in modules with microphones that send out and pick up ultrasonic reflections from objects. When the ultrasound detects someone moving closer to the microphone, the arms respond by exerting a growing pressure on the body. Seven of these modules are distributed across the suit to give the wearer as near to 360 degree ultrasound coverage as possible.
Mateevitsi tested the suit on students, getting them to stand outside on campus, blindfolded, and "feel" for approaching attackers. Each wearer had ninja cardboard throwing stars to use whenever they sensed someone approaching them. "Ninety five per cent of the time they were able to sense someone approaching and throw the star at them," says Mateevitsi.
Originally posted by aboutface
reply to post by Bluesma
Well I can't picture myself wearing a whole suit, but I could appreciate something smaller, such as something built into a sleeve, especially for women who have to walk alone in the dark after work, or to their car etc. Many are already instictively on high alert, but if something produced pressure on the arm for instance, then at least they would have a choice of which direction/action to take next, don't you think?