// multi-utility computation suite · offline · instant · precise
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sci.aliasing-Nyquist-check Calculator
Checks whether a given sample rate satisfies the Nyquist criterion (f_s ≥ 2f_max) and calculates the aliasing frequency for undersampled signals: f_alias = |f_s × round(f/f_s) − f|. Anti-aliasing filters must attenuate all signal content above f_s/2 before sampling — practical filter roll-off requires oversampling by 1.1–1.5× the Nyquist rate.
Inputs
F Signal Hz
Cycles per second (Hz). Audible sound: 20 Hz – 20 kHz. Make sure units match what the formula expects.
Fs Hz
Amount per unit of time or per unit quantity. Check the denominator before interpreting.
F Analog Filter Hz
Reference formula or conversion factor shown for context.
Results
Nyquist frequency (Hz)
Sample size or count used in the calculation.
aliased frequency if unfiltered (Hz)
Sample size or count used in the calculation.
oversampling ratio
The proportional relationship between two quantities.
anti-aliasing filter margin (Hz)
Sample size or count used in the calculation.
Nyquist theorem
Sample size or count used in the calculation.
verdict
Qualitative pass/fail or risk assessment based on the calculated score. Always examine the underlying numbers — classification boundaries are simplified guidelines.