Turbojets are truly that much louder than the turbofans we're now used to. At the time it was only a bit louder than contemporary aircraft, but everything else

Turbojets are truly that much louder than the turbofans we're now used to. At the time it was only a bit louder than contemporary aircraft, but everything else got far quieter. Concorde is more comparable in engine noise to a modern fighter jet than it is to most commercial aircraft.