F-15/16 on final, as the air driven augmentor nozzle motor runs the nozzle to full open. There's a real brief, low key "Wheet" sound, lasts less than a quarter - maybe half second, while it runs the nozzle fully open. Always killed us, because when we had to do it by hand, it would take about five-ten minutes using a speedhandle to open or close the nozzle so we could trim it.
I can't believe I forgot to include that one. Also, the F-15 jet fuel starter as it shuts down when engines are started...that "whoot" sounds as it goes down an octave or more, is unmistakable.