Bispectral analysis of high-amplitude jet noise

Research output: Chapter in Book/Report/Conference proceedingConference contribution

7 Scopus citations

Abstract

The overall sound pressure levels of noise radiated by military jet aircraft along certain angles are such that nonlinearity is likely to influence the propagation. Bispectral analysis of noise data from the F/A-18E Super Hornet has been carried out in order to provide further evidence that nonlinear effects are indeed present. The bicoherence, which is a normalized form of the bispectral density, has been previously used in a variety of applications to detect quadratic phase coupling (QPC) in a signal. In this case, the results of the bicoherence calculations indicate that QPC is indeed present at high-thrust conditions along the peak radiation angles, which means that nonlinearity does play a role. However, additional investigations are still needed to more fully understand the physical interpretation of the bispectral results for a random noise signal, which will also help better quantify the role of nonlinearity in jet noise propagation.

Original languageEnglish (US)
Title of host publicationCollection of Technical Papers - 11th AIAA/CEAS Aeroacoustics Conference
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
Pages1738-1751
Number of pages14
ISBN (Print)1563477300, 9781563477300
DOIs
StatePublished - 2005
EventCollection of Technical Papers - 11th AIAA/CEAS Aeroacoustics Conference - Monterey, CA, United States
Duration: Mar 23 2005Mar 25 2005

Publication series

NameCollection of Technical Papers - 11th AIAA/CEAS Aeroacoustics Conference
Volume3

Other

OtherCollection of Technical Papers - 11th AIAA/CEAS Aeroacoustics Conference
CountryUnited States
CityMonterey, CA
Period3/23/053/25/05

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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