Nyquist Theorem (Dynamic Signal Analysis)
A principle used in the digitization of analog signals. For an analog-to-digital conversion device to faithfully record a signal, sampling of the analog waveform must be taken above a certain rate or frequency. The number of samples per second is called the sampling rate or sampling frequency. (Example: If the highest frequency component for a given analog signal is fmax, the sampling rate must be at least 2fmax, or twice the highest analog frequency component to prevent aliasing from occurring.)