Turning optical fiber cable into microphone

[This 1s]

Looking for stuff I found this post:

http://blogs.wsj.com/tech-europe/2012/09/04/turning-a-fiber-optic-cable-into-a-microphone/


Is internet cable in house a hot mic?

Is it the end of the fiber, the field around the cable, or both?


Thanks in advance :D
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