Modifies some current sounds and adds some new ones. (#5489)

Pretty much title, swapped some sounds around and added a few new ones.

code/modules/supermatter/supermatter.dm

@@ -159,6 +159,10 @@
 		if((damage > emergency_point) && !public_alert)
 			radio.autosay("WARNING: SUPERMATTER CRYSTAL DELAMINATION IMMINENT!", "Supermatter Monitor")
 			public_alert = 1
+			for(var/mob/M in player_list)
+				var/turf/T = get_turf(M)
+				if(T && !istype(M, /mob/abstract/new_player) && !isdeaf(M))
+					sound_to(M, 'sound/effects/nuclearsiren.ogg')
 		else if(safe_warned && public_alert)
 			radio.autosay(alert_msg, "Supermatter Monitor")
 			public_alert = 0