Mine changes both tone and intensity only when I strain my abdomen (as you usually do in a bathroom). What does that mean? Does it depend on a blood pressure? But my bp is pretty normal and lowering it would harm other things, I guess.

I also found out that tinnitus gets worse if I'm listening to it, and almost disappears when I quit giving a fuck about it. Also, if you have one, and you are subject to nervousness do not try that fingers-on-the-nape trick. It will disappear and then may return back two-three times worse for some time. Strangely, I have severe one, but don't care much.

Also, it intesifies in threads like this one, probably because I'm actively thinking about it.