It does not matter where you are in the server, everyone will hear you when you open a can. And you can hear every one who opens a can.
I don't know if this is for specific servers only but I noticed it in a lot of servers.

Sidu, that seems to be the same problem but there is a lot of info missing there.

That repport say's its random and that players behavior plays no role.

The bug I report is that when a player opens a can the entire server can hear it, That is something very different which i thought needed a seperate post

I think that is the most important part.

I have posted a separate repport, adding the information that its not random.
When someone in the server opens a can the entire server is able to hear it.
I've reproduced it multiple times with friends.

http://feedback.dayzgame.com/view.php?id=3633