spectrogram

基本解释

The term "spectrogram" is borrowed from optics .
“声谱图”一词是从光学借来的。
For cetaceans, the sound can be doing lots of other things that are not visible on a spectrogram, " says Fischer.
对鲸类来说，声音还可以转化成很多声谱图无法展现的形式，”菲舍尔说。
As you can see from this linear spectrogram of a minke whale's "boing" call, the detail gets smeared out and individual pulses cannot be distinguished.
就像你在这张小须鲸“啵嘤”声的线性声谱中看到的那样，细节信息被模糊掉了，独立的脉冲也很难分辨出来。

But audio experts say that the basic principles the CIA uses are likely the same ones that have driven the field of voice recognition since the 1940s: use of a spectrogram, a visual representation of the frequencies of human speech.
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