LocalAmbientSound
From ZDoom Wiki
void LocalAmbientSound(str sound, int volume);
Usage
Plays a sound at world volume (can be heard at the same volume no matter where the player stands) that is only heard by the activator of the script. Volume is an integer range from 0 to 127 with 127 being full volume and 0 being muted.
Examples
Script 1 Enter
{
LocalAmbientSound("QTalk",128); //Plays a sound at full volume that is only heard by the activator
Print(s:"Welcome to Hell");
}

