2 ms·
It sounds like a WW-II air-raid siren. https://www.youtube.com/watch?v=WgaCNEQzL1Q https://www.youtube.com/watch?v=WgaCNEQzL1Q
by chiph 6y ago
It sounds like a WW-II air-raid siren.
https://www.youtube.com/watch?v=WgaCNEQzL1Q https://www.youtube.com/watch?v=WgaCNEQzL1Q
- djmips 6y agoSomeone said it's 440Hz and "something I read online" says the UK air raids had a component frequency of 450Hz.