denverpilot
Tied Down
Thought it was interesting. Probably not going to be an FAA-Approved sleep apnea treatment anytime soon, though.
http://blogs.discovermagazine.com/d...g-keeping-you-awake-didgeridoo-to-the-rescue/
http://blogs.discovermagazine.com/d...g-keeping-you-awake-didgeridoo-to-the-rescue/