I think some sounds get retrained so the brain is not so reactive. The brain can still overload and react to the more problematic sounds, restaurant, loud group of people, etc. My tolerance has improved but I still need to be ready to put my ear plugs in. I am still subject to visual over-stimulation. Bright lights do not cause problems. They just make it harder to focus on a task.

I find it is important to be ready to recognize the over-stimulation. I just need to be cognizant of when I am starting to struggle with the stimuli. My wife can recognize me straining to focus. She will often ask if I need my ear plugs or it we need to leave the over-stimulating environment. She sees it on my face and recognizes it before I do.