Dear lords yes.
If someone takes too long getting a chip from a chip bag the rattling makes me want to cram it down their throat. I don't know why, just the sound sets me completely on edge. I don't think anyone but my husband knows though, because I usually step out of the room if it continues and I think I might say or do something inappropriate. That's one of very few sounds that gets me every damned time. Something about the frequency.
Our fire detectors, the alarm will make me flee from the house at top speed. We had to change the original ones because they went off so often I was worried I'd drop something I was cooking in the haste to flee and *cause* a fire. Again-the frequency-but that one actually makes my ears hurt.
I have very sensitive hearing-because my PTSD is a result of childhood issues, I never got into listening to loud music because I always felt a need to hear what was going on around me just in case something bad was about to happen. I used to think it was just that my hearing wasn't as damaged as those around me, but now I know better.
As for light sensitivity-yes-but people with blue eyes are apparently prone to it, so I keep my sunglasses close in case I have to go outside, and the act of wearing them so people can't see my eyes actually helps calm me in social situations.
I don't often get overloaded by people, but it has been known to happen-still not sure what sets it off as it's a pretty sudden onset and fairly rare. I expect it's my perpipheral consciousness picking up threat behaviour somewhere in the crowd, seeing as I've never experienced any danger while in the midst of groups of people, but I'm still deep in my hypervigilance-I just cope by handing it off, so to speak.
Most of what I do is coping. I ask for volumes to be lowered, I hide in my room, I flee the area, etc etc. Heck, we changed grocery stores because the way the acoustics were in our old one could drive me out if there was more than a small crowd (exposed tin sheeting).
I suppose wearing headphones would help, but I have to wear in ear phones because of jaw issues, and I have yet to find a pair that doesn't try to drop out every third step. In this day and age wearing them would be pretty normal, and I could always put some soft music on to muddle the sounds if need be.