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Originally posted by Algebra
Originally posted by RussianScientists
reply to post by Algebra
You would be waisting your time to cover the room's wall's, ceiling and floor with a Faraday Cage of metal in trying to keep the signals inside the room, there still would be leakage and interference. A constant stream of radio waves already permeates most rooms, why not use those waves.
Old junky AM radios will detect movement in a room, just as old junky black and white TVs with rabbit ear antennae used to. Just find the right spot on or off of a channel and you have an excellent detector for certain spots that you want to watch for movement, like through a doorway. The old TV will give you a visual response as well as an audio response.
[edit on 28-12-2009 by RussianScientists]
Yeah i can remeber that my T.V when i was younger used to react when you came in to the room. Its not exactly the kind of detection im talking about though. I would want to build up a 3D image of what has entered the room. Not just detect its presence. Thats what makes it hard to get my head around. I'll look in to the faraday cage though might give me some insight.