Come on guys!!!
It's not NOISE, it's .....the sound of FREEDOM!
Wock! wock! wock!
or in an Agusta-Bell, Wop! wop! wop!
The best noise complaint generated was from a B222 in a high hover over North Sydney back in 1985 when on trials for the Polair boys- apparently the police switchboard lit up like a Xmas tree, and Base called us to ask what the heck we were doing to make so many people ring up? The answer was simply - hovering.
And then when I got back to base, a bird decided to commit suicide by dividing itself on the angled tip of the blade. A Cocka-one became a cocka-two. More feathers and guts than you could poke a stick at, and a really strange POP! sound.