What is the fundamental frequency of a spectrum?
A signal with a period T repeats at a rate of f0 = 1/T, which is referred to as the fundamental frequency of the signal. Usually and intuitively, the Fourier spectrum of such a signal shows strong power at f0. In other words, the signal can be well explained by a sinusoid at frequency f0.
How do you find the fundamental frequency?
waves. The fundamental frequency (n = 1) is ν = v/2l.