Boom Supersonic sans Sonic boom

Supersonic planes will burn significantly more fuel than current aircraft, resulting in higher emissions of carbon dioxide, ...
Boom's Supersonic XB-1 jet became the “world’s first independently developed supersonic jet” to break the sound barrier Tuesday.
Instead, the Boeing 747 entered commercial service in 1970 ... They plan to fly their X-59 supersonic aircraft over US ...
Boom Supersonic’s XB-1 has broken the sound barrier, paving the way for faster commercial flights if future tests succeed.