Mine high pitch bi-lateral non-puslating tinnitus started about 4 months ago.
I felt a sleep on a chair while listening music in hedphones (I would say low volume, but not very very low). for about 2h, then woke up (it was a nap during the day over the winter holidays)
I had that high pitch noise, and from there on, especially in the morning it got loud. During the day slightly less. But still it was almost always on, my focus was disrupted, very hard to concentrate and work.
Now with the warm weather, every time I hear AC or fan sound (now that they are on in house and in car) , tinnitus comes back very fast -- But with less veracity.
In the last 4 months, I also switched and I listen to music very very low volume, to the point where I have to use a headphone amp and large circumference headphone drivers to recognize sound better.
I am using a headphone amp because phones volume control is not precise enough (either 0 or too loud on the next volume up click).
With an amp's volume control (and I have too many amps) I am able to adjust sound to a barely listenable volume where I can still enjoy sound tonality (of course it is not as good as listening at 15% or above levels of volume).
Headphones with large drivers seem to help me to recognize sounds and tonality better, at the very very low volume - so I use JVC HARX 700, Audio Technica A900x and a few others (just to change things up)...
I also prefer very large comfortable pads surrounding my ears, not sitting on top - so I ordered some veloure pads (turns out same pads fit the JVC and the A900x headphones !). The earpads are (if somebody is interested): "
Black Velour Ear Pads Cushion Earpads Cover Earmuff Replacement Pillow Compatible with JVC Harx700 Harx900 HA-RX700 HA-RX900 Headphones Headset
Brand: YDYBZB
"
Also if use headphones sitting on top of ears (rather than over the years), at very low volumes, they disrupt music sound (when moving my head, for example as the pads move a little more). So for now big big headphones, low low volume - work for me.
On top of the above, before I go to sleep (if I remember!) I take magnesium vitamin and drink Kefir (some times). Not sure if the above is of any help or I am just improving health wise -- but my tinnitus is a lot less now. I just feel like I need to calm down my body more, before going to bed. I think sleep has to do something with this, either sleep quality, or sleep positioning, or preparation before sleep, or food in the evening before sleep -- not sure -- I am still reading through the articles I see on this thread, and other places...
I would say listening at very very low volumes causes some sort of excersise to my hearing path-ways. I cannot measure it, but after about 2 months of forcing myself to listen at barely audible levels, I can enjoy music again, and mostly without that high pitch tinnitus.
I felt like the tinnitus I have is in 10khz range (as I tried to match the pitch to the online khz hearing tests). I can hear up to 12.5Khz (used to be able to hear up to 17Khz 13 years ago).
Audiologist says my hearing is above average (but she only tested up to 8khz).
Anyways, just wanted to share about this. I never had tinnitus before -- just started 4 month ago, and I thought it would only go worse from there, but for now I am getting better, fingers crossed.