OK I didn't expect anything to happen immediately, but I have some news. I have so far used tVNS three times for an hour each:
1 Yesterday I did one session with the tVNS and white noise notched at 8kHz. It didn't have a huge effect - I thought maybe my t was more hissy and less shrill for a few mins afterwards, but really nothing significant and may have been imagination.
2 Last night I then did another session, this time using
@generalfuzz's DIY ACRN also set at 8kHz. At the end of that my t was definitely more of an unfocussed hiss with less noticeable tones going on. Also the low pitched whirring noise that I got courtesy of some neomycin eardrops (cheers doc!) was much more noticeable. This all settled down quite quickly and within half an hour when I got to bed I'd say my t was pretty much back to normal.
3 Today I did another session with DIY ACRN at 8kHz. After this my tones definitely dissipated into a hiss and the low pitched whirring was less noticeable than last night, but still more prominent than usual. T overall was louder than usual. Over about fifteen minutes the hiss seemed to recede and a tone became dominant, but not one I've been aware of having before. It was definitely lower in pitch than what I am usually aware of being dominant, although my t is usually quite a complex cacophony. Two hours after the session ended, this was still how it was, although it seems now (about three hours after) to be turning back into more like the t I had before the session, if a bit louder.
Observations:
- My t is not stable at the moment (recent spike) so take these results with a pinch of salt.
- ACRN did not have much effect on me when I tried it previously, even using it 4-6 hours a day as advised. Using it for one hour along with tVNS has shown a
very significant effect on my tinnitus.
- My t is not at this point improved in any way, but it is definitely
affected in quite a powerful and complex way.
- On the official ACRN trial I was advised that if ACRN was working then it was expected that the pitch would drift downwards, and also that it might get louder at first. That description seems not incompatible with what I have experienced today in a compressed time frame.
- My t is composed of many sounds and so is probably not best suited to neuromodulating sound therapies. I am not confident about identifying any one frequecy accurately, and even if I did much of my t would probably be at quite different frequencies, suggesting that neuromodulating sound therapies are risky for me (I might make one part of my t better and another part worse).
- I used the tVNS device on a higher setting than advised in the instructions. I seem, however to have got more sensitive to the effect and can now feel the stimulation when it is set at 8. Previously I needed it set higher before I could feel it. Information I found online suggested setting it so that you can feel it clearly but it is not painful. This is what I have done rather than following the guideline of 5-8 in the instructions.
- My gut feeling at this point is that tVNS combined with ACRN seem a potentially very powerful intervention. If anybody else (perhaps with a more suitable t than mine) feels like giving it a try then I would be extremely interested to hear.