Eavesdropping on Sound Using Variations in Light Bulbs
New research is able to recover sound waves in a room by observing minute changes in the room’s light bulbs. This technique works from a distance, even from a building across the street through a window. Details: In an experiment using three different telescopes with different lens diameters from a distance of 25 meters (a little over 82 feet) the… Continue reading Eavesdropping on Sound Using Variations in Light Bulbs