What I noticed is that what works best to mask my T is water sounds (shower, faucet), but they need to be at high volume, which I'm reluctant to do, so I'm kind of stuck.
Same here. I don't know what it is about rushing water, but it's one of the few things that masks my tinnitus. I can hear my tinnitus in an airplane. Nothing I play on speakers or headphones seem to mask my T, not water sounds, not crickets, it has to be real rushing water.
The only thing that will mask my T is listening to iTunes with my ear buds cranked up (which I do nightly). Having said that, my T has been with me over 20 years and I'm completely habituated to it. Very high pitched, never changes and yet it is no longer an affliction but my mind has not only adapted it it but has embraced it and brought it into my psyche and merged it with my mind to become completely normal and preferred.
I don't know when I habituated to it, it just did...
I recall you talking about this before. Give some of us hope. When you say very high pitched do you mean like 12-16kHz or around 8kHz? Did it come on suddenly or gradually over time?