Update: instead of downshifting to 1x30 minutes, I've decided to suspend Lenire indefinitely. I may restart 1x30 minutes sometime in the future (maybe if they release an update or whatever).
I've given the device over half a year, and I've tried everything - the 1st timing, 2nd timing, 1st timing again, a long pause, the 1st timing at 1x30 minutes, the 1st timing at 2x30 minutes, etc. While the device does seem to affect my 1990 noises and decrease their volume, that's of no value to me, because I'm completely habituated to those noises. However, if I'm on Lenire, my 2016 noise spikes at night a lot more often (every 3-4 days) and doesn't let me sleep. That's causing a lot of fatigue and suffering.
Also, simply by using Lenire, attention is brought to tinnitus every single day. That's exactly the wrong thing to do.
For at least 2 years I was almost completely habituated to tinnitus - no distress during the day and bad nights once in a blue moon. That turned into frequent insomnia and hours spent obsessing over the current tinnitus volume almost every day, waiting for the promised relief to finally arrive. I took this for 6 months. Enough.
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Lenire definitely does something - it affects tinnitus; it did give me extraordinarily quiet days; I did have a few magical weeks back in December 2019. However, I also think that the device is very poorly understood. Those magical weeks never come back and Neuromod doesn't seem to be able to offer meaningful advice. They're well-intentioned, courteous and professional, and their device has great potential, but it needs a lot more data and refinement. I hope they'll be able to release an improved version that lives up to that potential.
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I'll now try and forget about tinnitus, which also means visiting the forum a bit less frequently. However, I'll linger around and will update you in a few weeks on how quickly the baseline returns post-Lenire.