http://www.theatlantic.com/technology/archive/2013/12/the-new-armor-that-lets-you-sense-surveillance-cameras/282335/
We pass under surveillance cameras every day, appearing on perhaps
hundreds of minutes of film. We rarely notice them. London-based artist
James Bridle would like to remind us.
Bridle has created
a wearable device he calls the “surveillance spaulder.” Inspired by the
original spaulder—a piece of medieval plate armor that protected “the
wearer from unexpected and unseen blows from above”—the surveillance
spaulder alerts the wearer to similarly unseen, if electronic, attacks.
Whenever its sensor detects the the type of infrared lighting commonly
used with surveillance cameras, it sends an electric signal to two
“transcutaneous electrical nerve stimulation” pads, which causes the
wearer to twitch.
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