|Originally posted by Tim D
I meant by inserting the flanged Ety's you push air out...letting go will immediately create vacuum type pressure. Obviously not as much as an issue with foamies.
Sounds plausible. This is an important subject, I think. I did notice an annoying pop the last time I removed the ER6, but thought nothing of it at the time. It didn't exactly hurt, but it was obvious that it could hurt.
It seems this is the same phenomena that occurs when diving (and flying) where the inner ear adjusts to the ambient pressure surrounding it. I can tell you that when it occurs during diving, the pain can become so unbearable that you basically have to force yourself to go to sleep for an hour or so.
There are techniques for equalzing the pressure upon the inner ear, one of which is swallowing while blocking off the nasal passage.
One clear sign that there is a pressure differential is that your hearing becomes attenuated like in an airliner when it seems you have earplugs on, then you swallow and everything becomes loud again. I don't have the ER6 with me now, but I did notice the attenuation when I was adjusting its position.