I’ve walked into plenty of places and complained about many high pitched whine noises over the years, and more often than not, I get a puzzled look followed by some variation of “what noise?”

And to preempt the obvious possibility I was merely hearing things or have tinnitus. Yes I’ve had my hearing checked, and I’ve also, on a couple of particularly egregious occasions, used sound measuring equipment that in one case validated that there was in fact a loud intermittent, nearly inaudible noise fluctuating between 80 and 85 decibels whenever it was occurring, that apparently no one else in the office noticed.