Visualizing the spectrum of a square wave is so easy, it’s used to teach the concept of the frequency domain. Less square square wave? You likely peeled off s

Visualizing the spectrum of a square wave is so easy, it’s used to teach the concept of the frequency domain. Less square square wave? You likely peeled off some higher harmonics and added some phase noise. The point of the experiment is to demonstrate that sound waves in air are not at all like water waves and sonic square waves do, in fact, exist.