Relationship between Aircraft Noise Contour Area and Noise Levels at Certification Points
Relationship between Aircraft Noise Contour Area and Noise Levels at Certification Points
复制标题
飞机噪声等值线面积与审定点噪声级之间的关系
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
C. A. Powell
中科院分区：
文献类型：
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作者：
C. A. Powell
使用声暴露水平等值线面积减少已被提议作为NASA静音飞机技术计划的进展和成功的替代或补充度量，该计划目前使用三个社区位置的预测噪声减少的平均值。由于该计划已扩大到包括机身噪音的降低以及由于优化操作程序以降低噪音而导致的减少，因此人们担心三点方法可能无法公平地衡量机场社区的利益。本文件涉及与该提案有关的几个主题：（1）为离港操作的认证噪声水平和噪声等值线面积之间的关系建立分析基础，（2）针对广泛的商用和商务飞机，检查预测噪声等值线面积和在认证测量点处测量或预测的噪声水平之间的关系，以及（3）预测低噪声进近情景的等值线面积减少量并确定源噪声的等效减少量。
The use of sound exposure level contour area reduction has been proposed as an alternative or supplemental metric of progress and success for the NASA Quiet Aircraft Technology program, which currently uses the average of predicted noise reductions at three community locations. As the program has expanded to include reductions in airframe noise as well as reduction due to optimization of operating procedures for lower noise, there is concern that the three-point methodology may not represent a fair measure of benefit to airport communities. This paper addresses several topics related to this proposal: (1) an analytical basis for a relationship between certification noise levels and noise contour areas for departure operations is developed, (2) the relationship between predicted noise contour area and the noise levels measured or predicted at the certification measurement points is examined for a wide range of commercial and business aircraft, and (3) reductions in contour area for low-noise approach scenarios are predicted and equivalent reductions in source noise are determined.