There has been some research in trying to minimize or at least spread out sonic booms by changing aircraft shapes and engine dynamics, but as far as I know they

There has been some research in trying to minimize or at least spread out sonic booms by changing aircraft shapes and engine dynamics, but as far as I know they're all still experimental. Boom is going to live up to its name if it ever actually flies, which means staying over the water whenever they are operating in the supersonic regime.