Hi Everyone,
For some years I too have been suffering with exactly the same phenonemun, my specialist says I am an enigma and dismisses it as tinnitus - which I know it isn't. Whilst doing my own research on the issue I stumbled across Snail's posting!
My problem is I only have one ear as I lost the other years ago after a botched mastoid operation.
Recently it has become far more aggressive and more sensitive to external low frequencies. The only time I get prolonged silence is after a few glasses of wine, I can still stop it, but it starts instantly and louder (exactly a lower B on a guitar – great for tuning it).
I can momentarily pause it by "humming" a frequency slightly off, but that only lasts a few minutes.
Any advice you can give would be awesomely appreciated!!