Question
The MATLAB function “waterplot” creates these plots. For 10 points each:
[10h] Name these plots that show the graph of a chirp signals’ namesake function. These colorful plots visualize signals with horizontal and vertical axes representing time and frequency domains, respectively.
ANSWER: spectrograms [prompt on waterfall plots or waterfall displays; reject “spectrograph”]
[10e] Color in a spectrogram represents this quantity, which is proportional to the square root of intensity. This quantity for a sound wave determines its volume.
ANSWER: amplitude [prompt on A]
[10m] Spectrograms are typically created with the “short-time” variant of this operation. This operation decomposes a signal over time into its constituent frequencies, which can then be plotted in a periodogram.
ANSWER: Fourier transform [accept short-time Fourier transform; prompt on Fourier; prompt on transform]
<Lalit Maharjan, Science - Physics> ~28233~ <Editor: David Bass>
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