http://www.youtube.com/watch?v=RbVGBikhqr4 - Unique mix of alarms in this video; faintly-heard smoke alarm in code-3, a fire alarm tone in 60 BPM march time (sounds like when you press and hold the “manual setting” on an emergency vehicle siren), and some mechanical-like alarm in continuous.
http://www.youtube.com/watch?v=A1d9sFJSBXU - Wheelock AS/MT and what may sound like Spectralert Classics in code-3.