Nyquist Frequency

Half the sampling frequency. Any analog frequency component above the Nyquist frequency will, after sampling, be converted (aliased) to a frequency below the Nyquist frequency.

Example: the theoretical Nyquist frequency of an audio CD recording is 22.05 kHz

See also: Aliasing, Anti-Aliasing Filter, Oversampling, Sampling Theorem.

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Subjects: Electronics Noise & Vibration