How a crisp packet can be used to eavesdrop on conversations

From: The Guardian

Research from MIT extracts audio from a silent video of everyday objects including crisp packets and potted plants

 

Researchers at the Massachusetts Institute of Technology (MIT), working in conjunction with Microsoft and Adobe, have developed a method of reconstructing sound from a video of an object – letting them use a crisp packet, glass of water, or potted plant as a microphone.

The technology is similar to the laser microphones used by spies around the world to eavesdrop on conversations by measuring minute vibrations in reflective surfaces.

But rather than using expensive, specialist equipment, the researchers were able to extract audio from a high-speed video of everyday objects

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