When someone calls someone else “loud” what do they mean? Is the person literally loud? Or, does it mean something else? I have the feeling it is the latter.
My husband is loud and his family all in one room is a level of loud that has been experienced by some…survived by few.
I think loud means decibel-loud. Though there’s always the snappy dresser that just can’t coordinate an outfit, I rarely hear that referred to as “loud” anymore.
I’ve been called loud lately by colleagues - in my case it’s apparently because I am loud voice-volumewise…Let’s just say my voice carries.
Sandy from where I used to work. Loud, vocally. Always assumed everyone was interested in everything she said. You could hear her four aisles over in the grocery store, and over and above the machines at work.
I think “loud” and “boring” usually go together.
The only other “loud” I know of refers to wardrobe – splashy bright colors – old time golf course and resort loud.
On preview, I’m sure that Kalhoun’s husband and EuroMDGuy are NOT boring. 
I don’t know a boring loud person (vocally), sometimes annoying, but not boring.
If I say someone’s “loud”, it does mean that they seem to have some issue controlling the volume of their voice.
One of my co-workers is really loud. She just doesn’t seem to have a volume control, so everything she says is a couple of notches louder than necessary. I myself am biased towards quiet people- unnecessary loudness always makes me think subconciously, “self-important and annoyingly extroverted”. I am aware that this isn’t always true about loud people, but it’s my kneejerk reaction.
To me it means exactly what it says - the person simply has no concept of speaking in anything other than a yell. It’s physically tiring to have a conversation with such person. And often embarrassing too, since personal details tend to get broadcast to everyone else in the immediate vicinity.