[doctoring]

I had the same question. From their FAQ (https://boomsupersonic.com/faq):

> Will Overture use afterburners like Concorde?

> No. Overture will fly without the use of afterburners, meeting the same strict regulatory noise levels as the latest subsonic airplanes. The airliner will be powered by the Symphony propulsion system. Symphony will be a medium-bypass turbofan engine designed and optimized for environmentally and economically sustainable supersonic flight.

[foobarqux]

> ... meeting the same strict regulatory noise levels as the latest subsonic airplanes

Extremely dishonest: as far as I can tell (CFR title 14, B36.5) there are no specific noise level regulations for subsonic cruise flight (i.e. not take-off and landing) because you can't hear subsonic aircraft at cruise altitude. On the other hand, however, you will be able to hear sonic booms.

[stetrain]

I think that statement is saying it will meet those noise levels for takeoff and landing, not during cruise which will be over the ocean.