Eavesdropping By Watching A Lightbulb

Image: Ben Gurion University

Researchers at Ben Gurion University have demonstrated that sound in a room can be reproduced by watching a lightbulb in that room, from up to 82ft away. The technology, named Lamphone, detects vibrations on the light bulb caused by the sound in the room and process these vibrations to recreate the sound. The resultant audio is good enough for Shazam to recognise a song that was played in the room.

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