"The guy took the trouble to find this site and to post on the correct forum. Why not keep replies objective?"
Read the title of the thread- "Noise suffered by the people on the ground". Those interested in suffering, nothing will do but acknowledge victim-hood and eliminate it completely. It's not an objective question of quantity of the issue, the issue has to be eliminated or the 'suffering' continues. How much inconvenience constitutes "suffering"? I have been in the biz for decades and carried on normal conversations on busy heliports...