- Reaction score
- New York City
- # of dives
- 1000 - 2499
It appears that some divers do not perceive pain until too late.
A missed BTV is easily detected, because a succesfull BTV is clearly perceived. A missed Valsalva instead can be confused with a succesful one, as the strong pressure caused by lungs overwhelms the neural receptors of the tube.
It is also an acoustical effect. Whie doing the BTV, the driver is breathing normally. The regulator is very noisy, so when the BTV is opening the tube, you hear the loud noise of the reg through it.
It is impossible to confuse a working BTV with a failed one.
During a Valsalva the airways are closed, so there is no loud noise perceived when the tubes open...
Sorry, I really don't understand the physiology you are describing here, or the terminology. Missed equalization means a pressure gradient across the tympanic membrane, which stretches it, which hurts. Has nothing to do with noise, this is a pain signal, primarily via the trigeminal nerve. There either is or isn't a gradient. Don't know what the neural receptors of the ET have to do with it.