Here ’s something creepy : researcher at the University of Utah have develop a way to practice wireless signaling to detect apparent motion through solid walls and door .
The technique , address variance - based receiving set tomographic imaging , processes sign from a 34 - thickening IEEE 802.15.4 wireless meshing . It ’s the communications protocol for personal expanse networks used by abode automation systems such as ZigBee .
The introductory idea is straight . The signal strength at any detail in a internet is the sum of all the way of life the radio waves can take to get to the recipient . Any variety in the volume of space through which the signaling pass , for object lesson induce by the movement of a individual , make the signal strength variegate . So by “ question ” this volume of space with many signals , picked up by multiple receiver , it is possible to establish up a characterization of the movement within it .
They were able-bodied to discover movement in a elbow room to within a metre or so , which is moderately good . They wo n’t be able-bodied to see what you depend like in the shower , however , so I ’m going to call this a effective advancement . But be careful , researcher . Do n’t try anything unelaborated . [ Technology ReviewviaSlashdot ]
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