thank you for the responses guys.
for information, I used normal earplugs before that I bought in motorcycle shops. I rode with them until now. I ordered earplugs on measure, like lonerider described. I tested them out a few days ago, but the noise reduction isn't that good as I expected.
noise reduction is maybe a little bit better then the normal (mousse) ones. the biggest advantage is that you can clean then very easily.
I tested 3 windscreens the last 2 months, from small to big. It is almost certain that no windscreen gives you the most laminar airflow. Turbulence is certainly not wanted. so i'm riding since spain without windscreen. although, the best to reduce sound, is a very well adapted and very big windscreen...
maybe because of the inflammation, my ears are very sensitive.
but for the moment I cannot ride a bike even at mid speed without having the feeling I am destructing my ears.
I cannot remember how it was before, how it felt before when I was riding day trips in Belgium...
the ringing... its quite loud...
sure there are many different ways of keeping travelling, honda C90's, I even was thinking of buying 2 camels

but it isn't the same...
I have some time to think about this. I can live on 15€ a day here. But for the moment I think going back to Belgium, leave the bike here and do better research in belgium Hospitals is what I will do. Hoping that after a month or so, the problems are maybe not solved, but sorted out. then I can continue...