spectrogram

基本解釋

The term "spectrogram" is borrowed from optics .
“聲譜圖”一詞是從光學借來的。
For cetaceans, the sound can be doing lots of other things that are not visible on a spectrogram, " says Fischer.
對鯨類來說，聲音還可以轉化成很多聲譜圖無法展現(xiàn)的形式，”菲捨爾說。
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.
就像你在這張小須鯨“啵嚶”聲的線性聲譜中看到的那樣，細節(jié)信息被模糊掉了，獨立的脈沖也很難分辨出來。

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.
NPR: Bin Laden Tape Won't Raise Security Levels