Influence of Major Noise Sources on Interior Noise in a Fighter Cockpit

XUE Qing; DONG Ningjuan; YAN Qun; CHEN Yixiao

doi:10.7643/issn.1672-9242.2026.08.001

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Equipment Environmental Engineering ›› 2026, Vol. 23 ›› Issue (8) : 1-8. DOI: 10.7643/issn.1672-9242.2026.08.001

Special Topic——Comprehensive Environmental Strength Analysis and Testing Technology for Equipment

Influence of Major Noise Sources on Interior Noise in a Fighter Cockpit

XUE Qing, DONG Ningjuan, YAN Qun, CHEN Yixiao

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Abstract

The work aims to analyze the influence of major noise sources on the interior noise of a fighter cockpit. A hybrid FE-SEA (Finite Element-Statistical Energy Analysis) model was established to predict the noise levels inside the fighter cockpit. Based on the surface sound pressure power spectra obtained from simulations and the noise power spectra of the environmental control system (ECS) outlets, a model of the primary noise sources was developed. Under individual excitation by each noise source, the influence on the cockpit interior noise was analyzed. The total sound pressure level prediction error of the cockpit FE-SEA model within the frequency range of 50 Hz to 10 kHz was 2.2 dB. Under the supersonic cruise condition with Ma=1.5, boundary layer noise was the dominant source of cockpit noise; under boundary layer excitation, the interior acoustic field exhibited broadband characteristics, with higher sound pressure levels in the mid- to high-frequency ranges. Under the supersonic cruise condition with Ma=1.5, engine noise primarily affected cockpit noise in the frequency bands of 50-250 Hz and 1 000 Hz-10 kHz, but its contribution was relatively minor in the 315-800 Hz band. Under the supersonic cruise condition with Ma=1.5, ECS noise significantly influenced cockpit noise in the range of 315-5000 Hz, while its contribution was minimal in the 50 Hz~250 Hz band. The developed FE-SEA noise prediction model for the fighter cockpit includes structural subsystems, acoustic cavity subsystems, and noise source models for boundary layer noise, engine noise, and ECS noise, clearly identifying the contribution patterns of each major noise source to the cockpit interior noise.

Key words

fighter cockpit / interior noise / FE-SEA hybrid method / noise source

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XUE Qing, DONG Ningjuan, YAN Qun, CHEN Yixiao. Influence of Major Noise Sources on Interior Noise in a Fighter Cockpit[J]. Equipment Environmental Engineering. 2026, 23(8): 1-8 https://doi.org/10.7643/issn.1672-9242.2026.08.001

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