I live "south of Gatwick".
My nextdoor neighbour once asked me a while ago why we get aircraft noise in our area.
After some research, I discovered that the problem had absolutely nothing to do with engine noise. It is simply a function of crews throwing the flaps out at high speed and what is imagined by the public as engine noise, is actually easily solved by putting the flaps out at a more sensible slower speed.
I flew the BAe146 for many years and a very quiet aircraft it was. I was very surprsed to hear that Brussels airport had had several noise violations from BAe146/AvroRJ aircraft.
All of them were caused by dumping flap early on intermediate approach!