My Tinnitus was caused by an ear infection + loud noises - that lovely noise that you get after going to a movie/concert thats too loud, and your ears squeal is what i hear instead of silence, so a 'woosh' is preferable to a squeal to me
Each to their own of course - have seen 3 threads on OCF about the denki's 'clicking' when undervolted; perhaps they're not all equal Max.