http://www.lockergnome.com/craighton/2011/12/14/why-noise-cancelling-headphones-work-so-well/

Noise cancelling headphones are great for long trips by plane, train, or automobile and when you just want some blessed silence, but they're also nice for when you're trying to hear your own music without interruption from the outside world. But how do these miracles of science work?

You can get more info about the Bose QC3 here:
http://go.tagjag.com/qc3

You can watch the entire live TLDR episode here:
http://www.youtube.com/watch?v=bpj1ZccalVs

http://www.lockergnome.com/subscribe/
https://profiles.google.com/chris.pirillo
http://twitter.com/ChrisPirillo
http://www.facebook.com/chrispirillo