system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why can I usually hear when a person is black, without seeing them (phone calls or radio etc). And I don't mean accents.

Maybe it is an accent, and I'm just not aware I'm detecting it.  

**Edit: Apparently talking about differences in the "races" is racist.**
gpt
There can be a very slight innate difference from race to race, but it's more to do with culture and accent than physiology - although physiology can sometimes play a part. However most likely if you heard a black guy who was, say, dutch or portuguese, you wouldn't be able to tell his race. 

To make another example, Phil Lamarr is a black guy who's a prolific voice actor, if you didn't know who he was you'd never be able to tell the color of his skin. However I've noticed it's very difficult for white guys to do convincing voices of black characters.

Edit: Come to think of it, Phil Lamarr's normal voice doesn't sound like any particular race. Watch some interviews of him and see for yourself.