Noise suppression of fan engines

Claim 1

A TURBOFAN ENGINE HAVING A PRIMARY EXHAUST NOZZLE COMPRISING A VERTICALLY EXTENDING SLOT-SHAPED OUTLET OF RECTANGULAR CROSS SECTION HAVING A VERTICAL AXIS AND A HORIZONTAL AXIS AND COMPRISING VERTICALLY EXTENDING AND CONVERGING SIDE WALLS AND HORIZONTALLY EXTENDING AND DIVERGING TOP AND BOTTOM WALLS THROUGH WHICH THE PRIMARY EXHAUST GAS FLOWS, AND ALSO HAVING DISCHARGE MEANS THROUGH WHICH THE BYPASS FAN AIR FLOWS COMPRISING AT LEAST ONE EXHAUST NOZZLE ADJACENT TO AND IN VERTICAL ALIGNMENT WITH SAID PRIMARY EXHAUST NOZZLE AND HAVING CONVERGING SIDE WALLS CONSTITUTING CONTINUATIONS OF SAID PRIMARY NOZZLE CONVERGING SIDE WALLS AND FURTHER HAVING TOP AND BOTTOM WALLS PARALLEL TO THE DIVERGING WALL OF SAID PRIMARY NOZZLE ADJACENT THERETO, ONE OF SAID PRIMARY NOZZLE TOP AND BOTTOM WALLS BEING SUBSTANTIALLY COINCIDENT WITH ONE OF SAID BYPASS NOZZLE TOP AND BOTTOM WALLS WHEREBY SAID PRIMARY AND BYPASS FLOWS HAVE A SUBSTANTIALLY COMMON BOUNDARY SURFACE, AND FURTHER WHEREBY SAID PRIMARY AND BYPASS FLOWS ARE INDUCED TO FLOW IN EVER DECREASING DIMENSION ALONG SAID HORIZONTAL AXIS AND EVER INCREASING DIMENSION ALONG SAID VERTICAL AXIS.