You can see in this spectrogram that all of the energy that was once in the first spectrogram is gone from the top end of the spectrogram, and that there's breaks in the chorusing at two and a half, four and a half, and six and a half seconds, and then the sound of the jet, the signature, is in yellow at the very bottom of the page.
在这声谱图中，所有在前一个图中 表现出来的能量 全部从声谱图顶部消失了， 并且齐鸣中有间断，2.5 秒处、 4.5 秒处和 6.5 秒处， 之后是喷气机的声音， 特征是最底部的黄色部分