Originally Posted by
tartare
Now that sounds like a helicopter.
Interesting - three noises there.
The low frequency boom at first I assume is a shockwave ahead of the main rotor?
Then some main rotor tip noise as it flies past - and finally the noise of the fenestron?
Could well be, just recorded a low flyby
Bit you Fan find lots of Sounds in youtube...
i.e.
https://youtu.be/o1SWnUDD5hw
I.e.
https://youtu.be/4wHsNcvf3qA