Could anyone please point me to a resource that explains Fourier analysis in words an idiot could understand? I have read so many things on it, and it still makes absolutely no sense to me. I understand it's a graph of the sinusoidal frequency...but the frequency of what, and how is this measured? And how are the points on the plot decided? I'm sure there's a simple answer for this, but it's just completely going over my head. Thanks for your help!