Perhaps you should be more careful with your conversations in the future. If you are near a window in excellent sound insulation, someone might hear you. A team of researchers from Adobe, the Microsoft and MIT, they have developed an algorithm that can capture sound with a camera, simply detecting tiny vibration of an object in the video. The technique exploits the sequential shutter in modern digital cameras (where the sensor reads the Pixels per one line at a time) to detect the movements associated with the sound and is almost invisible to the naked eye. A camera frame rates high enough to record conversations from a bag of crisps, and music from the leaves of a plant.