» Tue Aug 17, 2010 8:59 am
If you want to hear the sound it's suppose to make, go to Semper Fi or Die and equip it, this thing goes crazy when allies are nearby.
edit: just found this video
http://www.youtube.com/watch?v=zVlJYUTw83w&feature=player_detailpage#t=66s
In multiplayer, you have to upgrade it to be effective. You don't get the sound effect at level 1, I think. You'll get a visual effect on your radar when an enemy is within 30m. As the enemy get closer and closer to you, you'll start hearing the sound more and more and will go crazy if he's within a few feets.
Usefull at level 3 in multiplayer, you know when someone is camping near the Relay on CTR or when someone is coming when you defend a crash site.
In solo, if you want to be careful, you'll mark every enemy with your visor anyway so it's pretty useless.