// multi-utility computation suite · offline · instant · precise
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sci.resampling-nyquist-antialiasing Calculator
Calculates aliasing frequency for signals sampled below the Nyquist rate: f_alias = |f − round(f/fs) × fs|, and the required anti-alias filter cutoff. Undersampling is intentional in some ADC designs — bandpass sampling of a signal near Nfs/2 aliases it to baseband without full-spectrum ADC.
Inputs
F Signal Hz
Cycles per second (Hz). Audible sound: 20 Hz – 20 kHz. Make sure units match what the formula expects.
F Sample Hz
Cycles per second (Hz). Audible sound: 20 Hz – 20 kHz. Make sure units match what the formula expects.
F Alias Hz
Cycles per second (Hz). Audible sound: 20 Hz – 20 kHz. Make sure units match what the formula expects.
Results
Nyquist frequency (Hz)
Sample size or count used in the calculation.
aliased frequency in baseband (Hz)
Sample size or count used in the calculation.
alias falls in audible band?
Sample size or count used in the calculation.
oversampling ratio (fs / 2f_signal)
The meaningful information component, separated from noise.