Here's audio of an actual eas "immediate evacuation" alert sent via the cap protocol, which is eas via internet, which then activates radio and tv stations ( in the usa)this particular alert was due to wildfires enchroaching on the town of silverthorne, colorado.
An old school airport style synthesised attention chime, as heard before announcements. Dry. G1-e1made in ableton live with the dead duck software ddx10 vst synth.
This is essentially a bass guitar with distortion with three layers of notes, merged together to make a "siren" of sorts. It can be used as a fire alarm, or maybe an alarm on a spaceship or ufo.
Sound of something from somewhere as best i can remember. Seems like it is the sound of a claymore or the like, in some game; by the time you hear it you know you are going to die. I messed with it at the end but you can cut that off if you want. No explosion at the end.
Generated sound as sinusoid 440hz - 0,8db for 0,1 secrepeat the sound for 10 timeschanging the pitch : a to g#/abrepeat one timechanging the pitch for the second half: c to b.