Just wondering, while I was exposed to guns and planes, I don't know that I could pinpoint one specific event on that front. The only thing I can specifically pinpoint in terms of injury is something I have never seen listed by anyone as a cause (and I don't know if it would cause long term damage or not)? Essentially, when I did the hyperbaric chamber and they dropped us almost instantly from X feet to Y feet (can't remember the values) it "popped" my ears and I was not allowed to finish the chamber part of the course. Hurt for a few days. Wasn't like your normal feeling you would get if they just don't open. Was actually fairly painful. Have had intermittent tinnitus since. I also struggle to hear if say there is a fan or something going in a room...hear the voices but can't make out what they are saying while others can. Or as an example a group of us were snowshoeing this weekend and while the rest can carry out a conversation, I hear the voices but can't make out the words (while everyone else can). Anyhow, was just wondering if anyone knew whether the hyperbaric chamber qualifies as a specific incident? It isn't like I know that is the cause but I know that was a specific injury. Being around the planes and guns was more of a routine thing where I can't remember any specific issue.