Most aircraft noise is made in the climb.Engine noise is loudest at full throttle.By lowering the circuit you could eliminate some of the noise and keep the circuits tighter.
I like to demonstrate bad weather circuits as low and tight as safety permits.
Power tuned exhausts are available from a company in Florida.They make some amazing claims about noise reduction,increased power,reduced fuel consumption(should pay for itself in no time in the UK).If it made my willie bigger i would get three.
