AuDHD here. I also have very little filter for incoming noises. I suspect it's an auditory processing issue.

My "cocktail party" effect is weak, I sometimes struggle to hear words properly through phone calls (which is a big part of why I don't like making them), and if a show or movie doesn't have captions on I'll probably miss a lot of dialogue. I've had plenty of people ask, "Are you deaf?" or tell me to get my hearing checked when I ask them to repeat themselves, despite every hearing test I've ever taken showing that my hearing is better than average. It's not my ears that struggle, it's my brain's ability to filter/process/prioritize sounds that's unusual.

At the same time, I'm distracted by all sorts of details. I had an ex once remark that when people spoke a language he didn't understand, he found it easier to tune out. I thought that absurd; if anything my brain becomes even more distracted by foreign languages. I still detect (and can recreate) novel language sounds, even though linguists and brain-researchers claim I should've lost the ability to do that decades ago.

I wish I could get a brain scan when listening to sounds and compare the results to scans of other people. I can't help but think it would shed light on a lot of life-long issues and peculiarities.