Let's talk about the other end of the acoustical spectrum, sound that is too high for humans to hear—ultrasound.
让我们来谈谈声谱的另一端，人类听不到的声音——超声波。
2
This soundspectrum spans about ten octaves.
这个声谱约有十个八度的跨度。
3
The WMAP team used computer programs to find the proportion of wave sizes generating the soundspectrum, just as a prism converts light wavelengths to color.