Quantifying nonlinearity in the propagation of noise from military jet aircraft

Kent L. Gee, Victor Ward Sparrow

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

5 Citations (Scopus)

Abstract

Because of the high noise levels radiated by military jet aircraft, it has been hypothesized that nonlinearity influences the propagation of the noise. A numerical model, which accounts for second-order cumulative nonlinearity, atmospheric absorption and dispersion, and geometrical spreading, has been developed to propagate jet noise waveforms. Numerical propagation of recorded waveforms from recent static engine run-up measurements demonstrates significant waveform steepening and an accompanying transfer of spectral energy to high frequencies that agrees well with measured spectra. Furthermore, the measured and nonlinearly-predicted waveforms are perceived to be significantly "louder" or "more annoying" than linearly-predicted waveforms, despite the fact that standard metrics such as overall sound pressure level (with flat, A, and C weighting) and Mark-VII perceived loudness show little difference between linearly-and nonlinearly-predicted spectra. The results of this study demonstrate the need for additional investigations with alternate metrics that more closely relate to perceived annoyance or loudness of high-amplitude jet noise.

Original languageEnglish (US)
Title of host publication19th National Conference on Noise Control Engineering 2005, Noise-Con 05
Pages397-404
Number of pages8
Volume1
StatePublished - 2005
Event19th National Conference on Noise Control Engineering 2005, Noise-Con 2005 - Minneapolis, MN, United States
Duration: Oct 15 2005Oct 17 2005

Other

Other19th National Conference on Noise Control Engineering 2005, Noise-Con 2005
CountryUnited States
CityMinneapolis, MN
Period10/15/0510/17/05

Fingerprint

jet aircraft
military aircraft
waveforms
nonlinearity
propagation
jet aircraft noise
loudness
atmospheric attenuation
sound pressure
engines

All Science Journal Classification (ASJC) codes

  • Acoustics and Ultrasonics

Cite this

Gee, K. L., & Sparrow, V. W. (2005). Quantifying nonlinearity in the propagation of noise from military jet aircraft. In 19th National Conference on Noise Control Engineering 2005, Noise-Con 05 (Vol. 1, pp. 397-404)
Gee, Kent L. ; Sparrow, Victor Ward. / Quantifying nonlinearity in the propagation of noise from military jet aircraft. 19th National Conference on Noise Control Engineering 2005, Noise-Con 05. Vol. 1 2005. pp. 397-404
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Gee, KL & Sparrow, VW 2005, Quantifying nonlinearity in the propagation of noise from military jet aircraft. in 19th National Conference on Noise Control Engineering 2005, Noise-Con 05. vol. 1, pp. 397-404, 19th National Conference on Noise Control Engineering 2005, Noise-Con 2005, Minneapolis, MN, United States, 10/15/05.

Quantifying nonlinearity in the propagation of noise from military jet aircraft. / Gee, Kent L.; Sparrow, Victor Ward.

19th National Conference on Noise Control Engineering 2005, Noise-Con 05. Vol. 1 2005. p. 397-404.

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

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Gee KL, Sparrow VW. Quantifying nonlinearity in the propagation of noise from military jet aircraft. In 19th National Conference on Noise Control Engineering 2005, Noise-Con 05. Vol. 1. 2005. p. 397-404