I'm on 2 1/2 years, and sound is still an issue for me. I have found that my upper tolerance levels are slowly improving with time, but I still have a limit.

I avoid situations where there will be too much noise (ie: concerts), but do make the effort if I'm having an "up" day to try to tolerate some exposure before I reach for my earplugs. My hope is that exposing myself when I'm able to tolerate it will help my brain filter more and more over time.

Sometimes going someplace quiet for 5 minutes is enough, sometimes I have to leave. Being flexible for myself, and not trying to power through when I have reached my limit has helped the most. I think it's tougher on my husband than on me, because when I say I have to go, it usually means right now!