50 scientists who are changing the world

Abe Davis is finding new ways to use video by using the vibrations in it to reconstruct audio.

No sound? No problem. Abe Davis and a team of researchers from MIT, Microsoft, and Adobe developed an algorithm that can extract audio from silent videos by analyzing the tiny vibrations of the objects as captured by a camera.

In one experiment, the team filmed earbuds playing a song with no discernible sound. The vibrations of the earbuds in the video was enough to recreate a song identifiable by the app Shazam. When the team tried the experiment using an everyday point-and-shoot camera, as opposed to an expensive high-speed version, the vibrations were still able to reconstruct the sound. Davis presented these findings in a paper for Siggraph, a computer-graphics conference, and gave a TED talk where he demoed the visual microphone. And there’s more to come: The latest research from Davis and fellow graduate student Katie Bouman will be out this summer.

Davis is a doctoral student at MIT.

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