I've had the 7500 hz tone in my ears for as long as I remember, even as a kid. Not sure if I was ever exposed to some seriously loud noise, perhaps once or twice, but certainly not on a continuous basis.
Yes the ringing get worse as I wear ear plugs but I am not sure that I cannot put up with that for the length of a ride as opposed to loosing my hearing later on. YMMV
really do wish it would stop though....