Your crisps (chips) packet reveals your inner secrets....

[JasonD]

.... Excuse the clickbait title, I couldn't help it

Amazing story - watch the video, I was blown away.

http://www.theguardian.com/technology/2014/aug/05/mit-crisp-packet-eavesdrop-audio-sound

[littleman]

That's truly amazing.  This technology is going to make it into some thriller books/movies.

[Rooftop]

I read about this a while back where they were trying to do it with a glass of water.  Crisps though??? I'm glad I've got nothing worth knowing!