Spies can eavesdrop remotely by analyzing a light bulb's vibrations - techbrinks

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Saturday, 13 June 2020

Spies can eavesdrop remotely by analyzing a light bulb's vibrations


The “lamphone” measures the tiny fluctuations in light created as sound waves hit the bulb and cause it to vibrate ever so slightly. The electro-optical sensor is able to isolate the audio signal from the optical signal through four stages.

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