Signal Processing

What is a Spectrogram?

Spectrogram of square wave with harmonics 1, 3, 5, …, 19

A spectrogram is a graph that shows the evolution of the spectrum (the frequency contents) of a signal over time. Often, the frequency is on the vertical axis and time is on the horizontal axis. A spectrogram is computed by “chopping up” the signal into chunks and computing… read more

Submitted on 20 November 2013

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