Sally A. McInerny

Learn More
Published near-field analyses of full-scale jet noise are limited, and the application of observed laboratory-scale phenomena to full-scale jets is not well understood. To obtain a greater understanding of the connection between radiated noise and source characteristics in full-scale, heated, supersonic jets produced by military aircraft, extensive(More)
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(More)
This paper examines evidence of nonlinear propagation in noise data collected during flyover measurements of three different military jet aircraft. The measure used to examine the waveform data for nonlinearity is the skewness of the time derivative of the pressure waveform during the maximum amplitude portion of the flyover. The derivative skewness has(More)
Full-scale tactical aircraft noise exhibits multiple radiation lobes not seen in laboratory-scale jets. These lobes have different radiation directions yet appear to have similar, overlapping source regions. Near-field acoustical holography (NAH) source reconstructions, in conjunction with partial field decomposition (PFD) methods that produce physically(More)
Recent research efforts on nonlinear propagation from high performance jet aircraft have revealed an interesting challenge to predicting community response. This challenge focuses on receiver perception of these unique acoustical signals, which contain acoustical shocks that appear to increase their relative loudness and/or noisiness. This current finding(More)
The spatial extent and downstream origin of rocket noise sources can significantly impact the physical interpretation of directivity index measurements. Valuable updates to historical rocket noise directivity indices, based on recent measurements of Space Shuttle reusable solid rocket motor (RSRM) boosters have been published by Haynes and Kenny (AIAA paper(More)
Since its introduction, near-field acoustical holography (NAH) has been successfully used in characterizing the vibration of and radiation from a wide class of structural noise sources. In the past several years, some have begun to apply NAH to the characterization of aeroacoustic noise sources. To date, however, research has involved only axial fans and(More)
Noise measurements were conducted on a static run-up of a high-performance military aircraft to develop better noise models for this type of aircraft. This paper describes the measurement program and the resulting acoustic data. These measurements demonstrate nonlinear source and propagation effects from military jet aircraft. Moreover, these results serve(More)
Published near-field analyses of full-scale jet noise are limited, and the application of observed laboratory scale phenomena to full-scale jets is not well understood. To obtain a greater understanding of the connection between radiated noise and source characteristics in full-scale, heated, supersonic jets produced by military aircraft, acoustical(More)
  • 1