I grew up in such a quiet household... I didn't know what my mother would sound like if she yelled until my little sister was 3 years old (she was a holy terror, and by then, Mom was tired).
The angry thoughts and actions that passed in our house were all passive-aggressive and sarcastic. No one yelled.
So when I grew up and found myself confronted by people for whom yelling and screaming was normal and expected, I cowered in closets. If there's too much anger around me, I have to leave the vicinity: I'm too sensitive to the pain of the puppet-people suspended in their own self-hate and rage. I still get scared like a little child.