Sometimes it’s hard to tell exactly who can hear you, because sometimes people are just barely out of the range of hearing you. I’d like to propose something like what Gmod has gets added, a “players who can hear you speak:”
When people are within range, and you are speaking, a little piece of UI comes up showing who can hear you. This can help you differentiate further away people as hearing you or not, so you can know if your yelling out is effective or not.