I know precisely what you're talking about I HATE IT when people feel the need either out of comeplete disregard for others or they are just loud and i,too hate PTSD because i cringe and get extremely angry and confrontational.
I have always hated when i would be easily startled afterall i had to deal with the yelling through my whole entire chilhood.
Those of us who were abused know what it's like to always be on guard therefore i stay far away from people who just dont get it.
I feel your pain afterall i have been sober over 5yrs now and still i have moments when i'm startled by loud noises or people and i feel like screaming.
I'm a little better now but i can understand comepletely how you feel ....i know when i'm around loud peolpe and they are loud and i have no choice but to deal with it i have no problem asking them if they can keep it down and not yell so loud.
God bless you and i wish you the peace you sure deserve,'
" You never know how strong you are until being strong is the only choice you have "