I am certainly not a jet expert, but I know a little about the concepts associated with noise testing. Though I don't completely understand the question here, it seems to be associated with the noise footprint being made by the plane.
All other things being equal, the best rate of climb performance will get you the farthest away from earth in the least time. To keep the noise footprint small, you want to get the plane away from the ground as soon as possible. (assuming engine noise is otherwise not changed). Best rate of climb speed clears obstacles better, but the lower speed and climb rate leaves a larger footprint of noise.
There is a lot written about noise testing, and some of the theories behind it.
Perhaps some of these issues are factors in your question?