Re: Just After Takeoff
The replies have missed the obvious. Take off thrust is applied at the end of the runway. There is a maximum time limit on the engines being run at this thrust level or they would break which would reduce the noise even more, although significantly increase the noise in the cabin! At between 800 feet and 1500 feet (dependent on company policy) the thrust is reduced to climb thrust. This level of thrust can be kept indefinitely without any risk to the engines.
Any further reduction inthrust due to noise abatement is another matter.