I laugh out loud,even when I am alone!!!! I tend to laugh loudly when I am in a card shop and reading the very funny cards!! Other people look at me as though I am mad,until I show them whichever funny card I happen to be reading,then they happily join me in my very vocal mirth!!!
It's rare for me to laugh out loud. Even if something is really funny onscreen, I smile or silently giggle, but I'm laughing loudly on the inside. My husband on the other hand, is soooo loud, it makes me laugh out loud sometimes.
laugh out loud if the joke is funny enough. Some people like to laugh loudly for effect. At one place I worked one of the upper management staff used to have this irritatingly loud laugh when she was chatting to her peers, it was so annoying. She certainly brought attention to herself which she wanted.
I'm a bit like that too. In most situations I try to keep it quiet BUT if I am in a room like a church or library, where laughing in unacceptable or inappropriate, I get that awful uncontrollable laugh that requires a lot of work to keep it from being noticed. Not loud but much shaking of shoulders etc. I've been this way since I was a child and received many a thrashing from those gentle nuns that educated me. Bless them