With the amount of computing power available today (super computers, distributed, etc.) is this something that really requires real world testing? I understand that there is no substitute for the real thing but consider this - there may be multiple companies using this on a regular basis eventually. The impact to the environment as a whole (humans are not the only ones that will be affected by this) could be more than just an occasional nuisance.
I understand the need I certainly wouldn't want to get on a plane that hadn't undergone a real world test. However, large corporations being such as they are, will abuse this if it is in any way cheaper than doing so otherwise (air tunnel test, computer simulation, etc.).
I feel this is a resource that will need to be strictly monitored - you get X amount of tests in a limited amount of time along with not being allowed to go above Y amount of decibels.
However it ends up I wouldn't want to live under that corridor!