as you know the transonic phase is often associate with the bang. The principal cons of the transonic phase is the noise,it's why there is not supersonic passenger aircraft( cause the end of the concorde).Nasa (x59) and Boom(xb-1) do research to reduce this noise at door slam.
How is it possible? I know that we need a aerodynamic plane respecting the aera rule and have a thin fuselage. Have you" wind tunnel" images?or theorical explications?
Edit: for those who want i found more information about the bang on this vidéo. (2:35 to 4:45)