title: On autocorrelation analysis of jet noise.
abstract: Meaningful use of the autocorrelation in jet noise analysis is examined. The effect of peak frequency on the autocorrelation function width is removed through a temporal scaling prior to making comparisons between measurements or drawing conclusions about source characteristics. In addition, a Hilbert transform-based autocorrelation envelope helps to define consistent characteristic time scales. Application of these processes to correlation functions based on large and fine-scale similarity spectra reveal that the large-scale noise radiation from an F-22A deviates from the similarity spectrum model.
authors.affiliation: Department of Physics and Astronomy, Brigham Young University, Provo, Utah 84602, USA. blaineharker@gmail.com
authors.forename: Blaine M
authors.initials: BM
authors.lastname: Harker
authors.forename: Kent L
authors.initials: KL
authors.lastname: Gee
authors.forename: Tracianne B
authors.initials: TB
authors.lastname: Neilsen
authors.forename: Alan T
authors.initials: AT
authors.lastname: Wall
authors.forename: Sally A
authors.initials: SA
authors.lastname: McInerny
authors.forename: Michael M
authors.initials: MM
authors.lastname: James