What Is $1/f$ Noise

Before understanding how $1/f$ noise behaves, we have to intuitively understand what a power spectrum is. We will try to achieve that by visually looking at the effect of changing some parameters on random signals. Imagine that the signal we are using for our experiment is a pitch signal. This means that the values of the signal are pitches chosen (randomly or deterministicly) in time for a single melody for a specified time.