Computer Science
Advanced

Nyquist Sampling Rate

Minimum sampling rate to capture a signal without aliasing.

Formula

fs≥2fmaxf_s \geq 2f_{max}

Variables

f_sSampling rate
f_{max}Highest frequency

Example

CD audio: 44.1 kHz

Did You Know?

The Nyquist theorem says you must sample at twice a signal's frequency, why CDs sample audio at 44.1 kHz.

signal