>Was it so much worse than that of regular jet? A "regular jet" has turbofan engines where the center section of the jet, the part that actually compresses air

>Was it so much worse than that of regular jet? A "regular jet" has turbofan engines where the center section of the jet, the part that actually compresses air and burns fuel, is used to spin a big fan which supplies a good chunk of the thrust. The fan is relatively quiet compared to the actual fuel burning section of engine because it is exhausting gas at much lower pressure, think popping a balloon vs popping a tire. For a variety of reasons that you can google high bypass turbofan engines are not used on supersonic aircraft. This means all that thrust is coming from the actual engine itself. Per unit of thrust an aircraft that doesn't use turbofans is just going to be louder. So Concorde is just going to be louder than a "regular jet" but nothing special compared to any other jet making the same amount of thrust from similar engines. For acoustic purposes you can think of the Concorde as basically being two heavy fighter aircraft. Edit: Running the numbers based on Wikipedia specs for thrust with afterburners the Concorde is making about the same amount of thrust as four F18s. So throttle on the firewall Concorde should make about as much noise as the Blue Angels. That said, lighting the burners over a populated area would be a great way to wind up looking for a new job.