Ear equalization on the loop

[Wibble]

I think of it as being a kind of yawn: where the back of the throat is opened and the muscles around the back of the jaw are tensioned. Whilst yawning, you can stifle the need to open your mouth.

 

[Angelo Farina]

I think of it as being a kind of yawn: where the back of the throat is opened and the muscles around the back of the jaw are tensioned. Whilst yawning, you can stifle the need to open your mouth.

This is more or less the method I always used, which is called BTV (or VTO). Nothing to do with Frenzel, and you do NOT need to pinch the nose.
Only problem is that, on average, only 1 diver over 5 can perform BTV consistently:

How to Learn

<p><strong>Hands-free equalization technique, also called the VTO (voluntary tube opening) or BTV (béance tubaire volontaire), is not a necessary technique to master to become a good freediver, but let’s face it, it is a pretty damn cool one. If learning hands free has always been on your bucket...

www.freedivinginstructors.com

 

[mr_v]

Problem with Frenzel is that it requires to remove the mouthpiece, as a true Frenzel can only be performed with the mouth clused and pushing up with the tongue against the soft palate.
...
Most scuba divers who think to being using Frenzel are in reality using Marcante-Odaglia as they perform it with the mouth open, keeping the mouthpiece in it.

And I just learned something new, thank you! I have been performing MO ;-)