Frequency domain

Frequency domain

Frequency domain


“How can we visualize the frequency of functions?”


Sinusoidal functions have a measurable frequency. However, it can be hard to distinguish them when multiple of them with different frequencies are added together. So wouldn’t it be logical if we could make some way to visualize all of the different frequencies together? Well, let’s think about this. First, let’s isolate each sinusoidal wave from one another. Then, let’s take its frequency and plot it on an axis. Then, let’s take the amplitude of each sinusoid, and place it on another axis. We can then connect these, and make a graph from it. This construction is known as the frequency domain and is frequently used in control theory and electronics to pick out all of the different sinusoids present

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