Acoustic tests of a 6-cm model jet were conducted in the German-Dutch Wind Tunnel (DNW) 6- x 8-m freejet facility. The purpose of these tests was to evaluate a new free-jet shear-layer correction procedure that adds an empirical correction to the theoretical correction previously used at DNW. Static-to-flight effects on jet noise measured in the flow were used as the basis for evaluating the corresponding out-of-flow results. The experiment demonstrated that the new procedure significantly improves the accuracy of the flight effects measured by the out-of-flow microphones. Comparisons of the out-of-flow free-jet results to results obtained in closed wind tunnels and from aircraft flyovers show consistent trends.