Noise Simulator
See how sampling and filtering distort a clean biomechanical signal — and learn to choose a cut-off you can justify.
Clean signal
Noise sources
10%
20%
5%
16 lv
3
Your filter
Reference: Force plate signals typically use 20–50 Hz LP cutoffs to preserve impact peaks (Street, McMillan & Board, 2001). Kinematic signals use 6 Hz (Winter, 2009). Always justify your cutoff to the signal.
RMSE vs clean
—N
Peak preserved
—%
Impulse preserved
—%
SNR after filter
—dB
Clean signal (truth)
Noisy signal (what you collect)
Filtered (your attempt to recover the clean signal)
Tip: Start with the recommended filter, then try "Too aggressive" — watch the peak preservation drop while impulse stays close to 100%. That asymmetry is why force plate research insists on cutoffs above 20 Hz.