Hi there - I have also developed extreme sensitivity to noise and vibrations 3 months post injury. I suspect this is part of the general overload that the brain experiences after trauma and normally lessens over time. In the meantime ear plugs and avoiding excessive noise/stressful environments seems to be reccommended.

I did also read that noise sensitivity can be exacerbated by anxiety/focussing on it too much, so just seeing it as a temporary symptom may help, and distracting your brain with something else!

I am sure there are others on here who can give much better answers than me, but hope that helps a little.......