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Prediction of nonlinear acoustic propagation effects for high-intensity aerospace noise sources in the natural far-field environment.

机译：自然远场环境中高强度航空航天噪声源的非线性声传播效应的预测。

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A semi-empirical nonlinear aeroacoustic propagation theory was developed for the prediction of high-intensity flight/launch noise produced by full-scale aerospace operations. The resulting nonlinear aeroacoustic propagation model was verified by analysis of environmental noise propagation measurements on the Concorde, United States Air Force F-4C and F-16A aircraft and the Peacekeeper rocket. Propagation modeling of both aeroacoustic directivity and nonlinear attenuation effects were separately verified to be accurate. Model parameters were derived to document the extent of each physical acoustic effect. The parameters of nonlinear acoustic propagation were empirically demonstrated to be linearly related through analysis of multiple sources. These results verified the formulation of a Simplified Nonlinear Aeroacoustic Propagation (SNAP) model. Such verification supports the potential for application of SNAP to broadband aeroacoustic noise source propagation calculations.
机译：提出了一种半经验非线性航空声传播理论，用于预测由航空航天全面运行产生的高强度飞行/发射噪声。通过分析协和飞机，美国空军F-4C和F-16A飞机以及“维持和平”火箭上的环境噪声传播测量结果，验证了所得的非线性空气声传播模型。分别验证了航空声指向性和非线性衰减效应的传播模型是准确的。导出模型参数以记录每种物理声学效果的程度。通过多源分析，经验证明非线性声学传播的参数是线性相关的。这些结果验证了简化的非线性航空声传播（SNAP）模型的制定。这种验证支持将SNAP应用到宽带航空声噪声源传播计算中的潜力。

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