"Digital simulation." . . "Sound waves." . . "Turbofan engines." . . "Numerical flow visualization." . . "Mathematical models." . . "Far fields." . . . . . "Improved finite element modeling of the turbofan engine inlet radiation problem"@en . . . . . . . . . . . . . . . . . . . . . . . . . . . "Finite element method." . . "Engine inlets." . . "Computerized simulation." . .