Theres a whole article on the frenzel and valsalva technique here
http://www.freedivingfinland.net/nuk...tid=164&page=1
What you basically do is fill your mouth with air and close your epiglotis, nose and mouth, without your hands! Then push your tongue against your upper teeth and push up the soft palate to compress the air, doing it on dry land your inner ear should make a clicking sound. That should be it, or at least thats what I understand from it and it works for me
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Dive safe and shoot straight
- Hénré -
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