ventilation
	By Stomp
		http://freesound.org/people/Stomp/sounds/17441/
		Creative Commons Sampling+ 1.0
			http://creativecommons.org/licenses/sampling+/1.0/

door
	By timgormly
		http://freesound.org/people/timgormly/sounds/151271/
		Creative Commons 0
			http://creativecommons.org/publicdomain/zero/1.0/
