I'm a student studying sound and i and recording sounds this is one of the recordings. This sound was made by having the microphone near a fridge door that was opening and closing.
Opening and closing the car door. Two doors opening and closing, generating audio with two different tones. Audio captured with zoom h1 in my garage and no noise.
An edited version of pagancow's dorm door open and dorm door close - a large door with an industrial, metal doorknob opening and then closing. I removed a little of the background noise and combined the two files.