Metropolitan police in London have been recording the hum of the nation's electrical grid for the last seven years, the BBC reports. And not just for fun: fluctuations in the sound enable audio forensic experts to pinpoint the time when any digital recording - of, say, a phone call - was made.
Digital recording binoculars aren't really new--there are some cheapie versions available--but Sony's new DEV-3 and DEV-5 binoculars lift that humble tech into some really impressive new places. Instead of taking a regular set of binoculars and cramming a cheap video recording device into them, Sony took its high-end HD camcorders and molded them into the shape of binoculars. That means they can both record in 720p (high-def) and in 3-D--these might be the perfect tools for birdwatchers and other nature-types (as opposed to snipers).
