Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

The frequency spectrum of a time-domain signal is a representation of that signal in the frequency domain.

The frequency spectrum can be generated via a Fourier transform of the signal, and the resulting values are usually presented as amplitude and phase, both plotted versus frequency.1

Any signal that can be represented as an amplitude that varies with time has a corresponding frequency spectrum.

Source: Wikipedia.

history | excerpt history