I recorded the sound of my alarm clock using a zoom h4n recorder and a rode m3 microphone. I can picture this sound being used at the start of an audio documentary that discusses the morning routine of someone who has to wake up early everyday. Maybe even the start of a film; this loud and obnoxious noise is an instant attention-grabber.
Car alarm recorded on a tascam with an azden shotgun mic, with wind cover. Recorded about 4-6 feet from the front of the vehicle. Audio is straight outta recorded, no post production.
Sound of a fire alarm from a local elementary school, with two microtonal notes that are playing against each other in an interesting way. Lots of wind. Recorded on an iphone.