That's quite scary given you've been wearing earplugs too. I got bad tinnitus but thankfully it was just a buildup of wax that caused pressure on my ear drums. I can only assume you're ears have been flushed?

Mollydog, I always assumed that a windscreen would reduce wind noise and was about to go and buy one but you say it's worse?

Not all shields are noisy ... but many are. Getting the right shield at the exact right height and getting it quiet is a challenge ... but can certainly be done.

Many do a great job of blocking wind blast but set up "dirty air" over your helmet, which can be very noisy. This all varies broadly. The only bike I've owned where I was able to find a quiet shield was my DL1000 Vstrom.

I've tried and failed on four or five other bikes ... including my current 1050 Triumph Tiger. NO LUCK on my Tiger after 5 different shields and deflectors.

On my DR650 I really prefer riding with NO shield at all.
I'm in clean air ... yes, colder in Winter, but quiet with NO buffeting.

But if you get it right a shield CAN be made quiet ... and when you find that "sweet spot", it's well worth it for all season riding. Not great in super HOT weather.

You can rig up all kinds of wings and deflectors to help quiet your shield, products like the Laminar Lip. Others are more "tunable" and allow adjustment to tune out noise. I've tried them all.
http://www.laminarlip.com/
MRA X-creen Universal Motorcycle Screen Air Deflector Flip Spoilers

I wish you all the best and hope regardless of the outcome you are happy with what you have accomplished to date.

I also believe you should be seen by a specialist as your health is the most important thing you have in life, once you know fully what your dealing with you will feel better mentally as well. As it seems you are having a tough time right now, selling your bike is a choice you will have to make but i believe your travels should continue in the future.
The ringing may be reduced but it will not go away, I'm not a long rider but I worked on the oil rigs and have went to many loud music events (sometimes wearing earplugs, sometimes not) So I myself have very mild constant ringing and loud ringing will come and go on rare occasion. You will have to learn to live with it and remember to take precautions in the future, whatever works best for you. Personally I like EARBUDDIES, they are high end earplugs but not the expensive custom molded ones or the foam ones that expand in your ears and get sore after a while.

Yes, cheap foam plugs DO make your ears sore after hours of use. But the good plugs like Howard Leight, (maybe your EARBUDDIES?) don't typically cause soreness.

I wear mine 12 hours a day, have tried DOZENS of ear plug brands including custom molded ones ... the Howard Leight Laser Light are my choice. About $30 for a box of 200 pairs. As an Audio Pro, I've had quite a bit of experience with this. Listening is my job.

Very sorry to hear about your condition and trip cancellation. I think others have covered most of everything, but thought I'd add my two cents.

I recently developed (through exposure to a sudden, loud, higher frequency noise) chronic tinnitus. For 5 months now - frequency, amplitude are unchanged and constant. I'm very frustrated. More headaches, more frustration. And it's all impacted sleep cycles. Because I had a baseline hearing test a couple years back, I also see a hearing loss at higher frequencies - but that doesn't bother me - and arguably its slight enough it could be independent and par for the course. Tinnitus and hearing loss are not always coincidental.

I've seen two ENT specialist and an audiologist now. I was told in the most roundabout way - that its nerve to brain damage and there are no cures, per se (my case). It may still resolve on its own (or change), but nothing medically can be done. Yes, there are aids (frequency masking/white noise) aids, but no magic bullets. I was told to figure out way to cope - like others here, yoga, meditation, exercise, avoiding certain drugs, hydration…etc.

As others have suggested though - do seek medical help. A number of tests/exams that were performed on me (short of CAT/MRI scans), if nothing else, eliminated other possible causes of the hearing loss/tinnitus. The nature of my onset most likely points to the culprit.

I've also been recovering from wrist surgery, so taking ibuprofen (as suggested by others increases the tinnitus) has been a catch 22.

I have not ridden moto yet this year because of my wrist, but have managed cycling. Hoping that I'll find the right combination of ear plugs/helmet (and the other aids) that keeps me moving as I have grand plans for longer distance moto travel.

Thank you for your post, as I've learned much from others in this thread now. Wish you the best possible resolution and hope this is just a temp setback, and you find your way back on the road soon.