If you do run SC drops on the road it is advisable to wear ear plugs. I certainly do and I still hate the whine from them.
Now I suffer from Tinnitus and I can tell you that it is a most unpleasant problem. I put it down to not realising what excessive noise has done to me over many years and this includes rallying in noisy cars, working in noisy environments with angle-grinders and going to noisy night-clubs & discos. All I can say is learn from this. You really don't want tinnitus in your life and if my experience helps than I am pleased.