Merge pull request #5382 from mwerezak/air-alarm

A couple small things

code/game/machinery/alarm.dm

@@ -104,6 +104,9 @@
 	var/phoron_dangerlevel = 0
 	var/temperature_dangerlevel = 0
 	var/other_dangerlevel = 0
+	
+	var/alarm_sound_cooldown = 200
+	var/last_sound_time = 0
 
 /obj/machinery/alarm/server/New()
 	..()
@@ -169,6 +172,10 @@
 	var/turf/simulated/location = loc
 	if(!istype(location))	return//returns if loc is not simulated
 
+	if ((alarm_area.fire || alarm_area.atmosalm >= 2) && world.time > last_sound_time + alarm_sound_cooldown)
+		playsound(src.loc, 'sound/machines/airalarm.ogg', 40, 0, 5)
+		last_sound_time = world.time
+
 	var/datum/gas_mixture/environment = location.return_air()
 
 	//Handle temperature adjustment here.