Perhaps you might take a moment...actually a few hours sometime....stand out in your garden (if you have one) and do an inventory of noise sources and time them.
I would bet the major source of noise (besides the Missus and Curtain Climbers) will be Lorries, Trains, Cars, and Sirens (the noisy kind....on car tops) and perhaps some airplanes....and finally way down at the bottom of the list....helicopters.
I do, many hours, photographing helicopters and logging incidents (cue the p!ss taking, but if you lived here and knew the full situation you may actually understand)
Lorries, none. trains none, cars none, sirens a few, airplanes - regular but nowhere near a noisy as helicopters.
Sorry, but helicopters are by far the biggest noise nuisance here, and I am not just saying that, like I said we chose this house as it was quiet......