I apologize for using the terminology used during my treatment that might not be familiar to new posters. I suspect that anyone asking about it because of a doctors suggestion knows it's not an underwater treatment but Mark makes a valid point. I did communicate with Hacklene at length concerning the treatments and other issues via personal email.
These treatments are time consuming but not painful. I went 30 times for treatments that lasted approx. 90 minutes. I watched television or they would put my requested movie in the VCR. Sound is piped in to the chamber. You cannot take any reading materials into the chamber, no jewelry, nothing. The first time "going down" takes some effort on the patients part to clear their ears but I didn't consider it painful. The only side effect I had concerned my eyesight. I wear glasses but could go without them about after a few weeks of treatment. It's not permanent but sure was neat! Eyesight goes back to "normal" in a few weeks.
Minnie