Birdnow's Aviary

June 16, 2020

Spy Bulbs

Timothy Birdnow

Fascinating; light bulbs can be used to spy on people!

From the article:

A team of researchers at the Ben-Gurion University of the Negev in Israel has found that the vibration patterns in a light bulb can enable us to recover full conversations from hundreds of feet away.

But how can that be possible? The thing about the hanging bulb is that it acts both as a diaphragm and transducer. Apparently, these two, sound waves cascading on its surface and it converting air pressure from sound to small changes in light, means it is a useful gadget for intruders.

The paper states, "We show how fluctuations in the air pressure on the surface of the hanging bulb (in response to sound), which cause the bulb to vibrate very slightly (a millidegree vibration), can be exploited by eavesdroppers to recover speech and singing, passively, externally, and in real time."

I wonder if they used light bulbs to spy on Donald Trump?

Posted by: Timothy Birdnow at 12:09 PM | Comments (7) | Add Comment
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