From the University of Washington...
The Diver's Ear: Under Pressure
Scuba diving, snorkeling, swimming and flying can be fun ways to explore the depths and heights of the world - especially if you can clear your ears as pressure changes. In this presentation you will learn techniques for preventing middle ear barotraumas and steps to equalize pressure in your ears, and safe ways to prevent "ear squeeze."
http://www.uwtv.org/...t.aspx?rID=2272
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