On the Perception of Crackle in High-Amplitude Jet Noise
On the Perception of Crackle in High-Amplitude Jet Noise
复制标题
关于高振幅喷射噪声中裂纹的感知
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
T. Gabrielson
中科院分区：
文献类型：
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作者：
K. Gee;V. Sparrow;A. Atchley;T. Gabrielson
裂纹是有时在超音速喷气噪声中发现的现象，并且可以包括总体感知噪声的令人讨厌的和占主导地位的部分。在过去，爆裂声通常用音调波形的偏斜度来量化。在这项研究中，通过对统计高斯波形进行非线性变换，产生了与F/A-18 E加力燃烧室实际记录具有几乎相同的概率密度函数和功率谱的模拟波形。尽管加力燃烧室波形明显地发出噼啪声，但非高斯模拟波形的回放完全没有产生噼啪声的感觉，尽管其相对高的偏斜度
Crackle is a phenomenon sometimes found in supersonic jet noise and can comprise an annoying and dominant part of the overall perceived noise. In the past, crackle has been commonly quantified by the skewness of the tune waveform. In this investigation, a simulated waveform with a virtually identical probability density function and power spectrum as an actual F/A-18E afterburner recording has been created by nonlinearly transforming a statistically Gaussian waveform. Although the afterburner waveform crackles noticeably, playback of the non-Gaussian simulated waveform yields no perception of crackle at all, despite its relatively high skewness