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Every year, at midday on the 1st Wednesday in May, 1,078 air raid sirens across Denmark are tested. I originally misidentified these as warning sirens from the local oil refinery. There are 3 signals:
12:00: "Go inside"
12:04: "Go inside"
12:08: "Danger is passed"
Lots of information in English here: http://brs.dk/eng/aboutus/Documents/Sounding%20of%20sirens.pdf
Type
Wave (.wav)
Duration
1:08.678
File size
18.9 MB
Sample rate
48000.0 Hz
Bit depth
24 bit
Channels
Stereo
8 years, 5 months ago
Thanks @drkovorkian! It was actually a blackbird hopping around the recorder in my garden making those noises :D
8 years, 5 months ago
Fantastic sound, shame about the paper rustles!