Near-field noise measurements of a high-performance military jet aircraft

Intensity analysis of the dominant frequencies of military jet aircraft noise

“…Multiple references explain the procedure and measurement apparatus. 9,10 In this paper, the intensity measurements are used to explore some unexpected results found by other analysis methods in the peak-frequency region of the F-22 spectrum. …”

Sensitivity analysis of an equivalent source model for military jet aircraft noise

“…(See Ref. [15].) The real part of the complex correlated source distributions, shown in Figure 13, are reminiscent of the wavepackets used in other ESMs.…”

“…All results shown in this paper are for measurements at afterburner for some of the locations illustrated in Figure 3. A complete description of the experiment is found in Wall et al 15 Examples of the noise content for different frequencies across the 2 m high by 23 m long planes are shown in subsequent figures. Above about 200 Hz, one or more strong interference nulls runs through the planes.…”

Outdoor measurements of spherical acoustic shock decay

“…1. As with previous balloon, 1,14 military jet, 15 and rocket noise 16 measurements, data were recorded using National Instruments PXI-4462 dynamic signal acquisition devices, with the exception of the 805 m data, which were recorded using a USB-9233 sampling at 50 kHz. The PXI-4462 data were recorded at the maximum sampling rate, 204.8 kHz.…”