There is a very easy and quick way for determining whether you use Valsalva or Frenzel technique - simply try compensating with pinched nose but open mouth. If you have no problem equalizing, the epiglottis and soft palate are closed and you are indeed using Frenzel. If you are not able to equalize, because the air blows out of your mouth, then you are using Valsalva.
PS: it is surprising how many regular DB members are unable to spell the name properly. The techniques is
not called
Frenzal, nor
Fresnel or
Freznel (like used in the thread
http://forums.deeperblue.net/equalis...hallenges.html), but simply and clearly
Frenzel. Although it is not too important for the ability to compensate, spelling it incorrectly does not really show you've read about the technique carefully.
The Frenzel Maneuver, is named after Herman
Frenzel who was a Luftwaffe commander and taught this technique to dive bomber pilots during WW2. The original German spelling is FREHN-TZ(eh)L, in English is is usually spelled FREHN-ZEHL or FREHN-ZAHL.