I think you should make the sounds on the deathmatch server so only the person who got the Headshot or who is like dominating can hear it, this is only for the more common sounds such as the headshot and dominating ones.
It gets quite annoying when your playing on a tiny map and you constantly hear "HEADSHOT!!!!!!!!!! HEADSHOT!!!!!!!!!!"HEADSHOT!!!!!!!!!!HEADSHOT!!!!!!!!!!!!!HEADSHOT!!!!!!!!!!" for like 20 mins straight.
I've played on servers like this and its much more enjoyable because A) You still get to hear when YOU get a headshot/dominating/some other random sound. and Your ears dont bleed b/c of the overlapping and loud "HEADHEADHEADSHOTSHOTSHOT"