Measurement and prediction of noise propagation from a high-power jet aircraft

Kent L. Gee, Victor W. Sparrow, Michael M. James, J. Micah Downing, Christopher M. Hobbs, Thomas B. Gabrielson, Anthony A. Atchley

Research output: Contribution to journalArticle

19 Scopus citations

Abstract

The measurement and prediction of noise propagation from a high-power jet aircraft are discussed. The prediction of high-amplitude noise propagation has used various forms of the generalized Mendousse-Burgers equation (GMBE) to model the propagation. The GMBE is a parabolic nonlinear model equation that accounts for quadratic nonlinearity, geometrical spreading, and absorption and dispersion. Researchers have developed an algorithm that is used to propagate an actual T-38 noise recording. Acquisition of the pressure waveforms is carried out using National Instruments 24 bit PXI-4472 DAQ cards with a 96-kHz sampling rate. The temperature and relative humidity sensors are located at different heights to measure gradients near the ground. The linear predictions are direct extrapolations of the calculated one-third-octave spectra at 61 m out to 305 m. The extrapolation includes spherical spreading and atmospheric absorption.

Original languageEnglish (US)
Pages (from-to)3003-3006
Number of pages4
JournalAIAA journal
Volume45
Issue number12
DOIs
StatePublished - Dec 1 2007

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering

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