Mine seems to be 9880 or thereabouts - up that high it seems to be difficult to differentiate slightly higher or lower tones. Been living with that high a tone

Mine seems to be 9880 or thereabouts - up that high it seems to be difficult to differentiate slightly higher or lower tones. Been living with that high a tone for decades now and it's always been extremely noticeable. I always coped with it by convincing myself "that's just my brain's CPU frequency" - sounds a bit nutty but that's a coping mechanism which worked for me. Tried seeing my doctor about it a couple of years ago (UK, NHS GP) but at the time he dismissed it saying "nothing can be done" :/ This tone therapy - I'll try this and see how it goes.