I am also very sensitive to noise after some terrible neighbours - who were hospitality workers - would get home from an evening shift and laugh and drink in their courtyard in front of my bedroom window. I am not good with confrontation but they drove me to a point where I went berserk and confronted them. This did not stop them unfortunately. I know the feeling of agitation and fear when you think your hearing that first sign of noise. Its bloody horrible.
I actually ended up moving but now I'm moving to another busy suburb again and I am scared of getting noisy neighbours. I have been thinking about it and my strategy if this occurs is:
Firstly to be nice (even though its so aggravating and the last thing you want is to be nice). I think people find it harder to be inconsiderate towards nice people. Just ask to have a coffee with them and really sit down and chat with them about the noise levels and how it affects you without at all being angry.
If they ignore it - tell them nicely again and if they continue to ignore it I would probably raise it with the council (I know what you're thinking - good luck) but its worth trying.
In the meantime, I would try to practice acceptance. So I hear the noise and I accept it as a part of the environment. I don't put their faces to it, I don't associate the noise with 'rude inconsiderate people'. I just hear it as a part of the environment that I can ignore. I think the more we practice this the more it can be tuned out automatically. If every time we hear the noise we react really strongly and get all absorbed about how rude they are - it reinforces the anxiety and only builds on the problem.
I don't think its an easy exercise at all but it may help a bit. My partner was never bothered by the noise because he could tune it out. I also wonder if seeing a psychologist may help? They might have some more knowledge on strategies with noise anxiety.