At our local bike night conversation frequently has to be paused whilst departing bikes make their exit, not through choice but because it's impossible to hear anything. I should add these bikes are not Harleys.
It looks like the guv'n'mint have decided to check on this by installing "acoustic" cameras on a trial basis:
https://www.bbc.co.uk/news/uk-48564995
In Lincolnshire low flying fighter aircraft are not uncommon, I wonder if they'll get a ticket
, also if you were riding past an acoustic camera and a jet flew over would it trigger the camera?