Sonic flight without the boom

> Exactly how the article says they did it: They optimized the 
> shape of the aircraft to alter the ground-level overpressure profile 
> such that it minimized the perceived "loudness" of the boom at cruise 
> speed and altitude. (Qualitatively, it is not much different 
> from optimizing the shape of a boat to minimize its wake-drag.)

It would be interesting to know how the drag figures varied.
I notice it wasn't mentioned.

Pragmatist