How do I choose a low-pass cutoff for noisy motion data, and is there one correct number?
There is no single correct cutoff for noisy motion data: Winter-style residual analysis gives a starting point but is known to oversmooth, and the author of the commonly copied 0.05 cm threshold warned it was never meant to be used out of context; compute a cutoff as a first guess and check velocities/accelerations on your own data.
There is no single correct cutoff for noisy motion data: Winter-style residual analysis gives a starting point but is known to oversmooth, and the author of the commonly copied 0.05 cm threshold warned it was never meant to be used out of context; compute a cutoff as a first guess and check velocities/accelerations on your own data.
Curator qualifications: Sources read 2026-10-22; no data filtered.
Limitations: Sources read 2026-10-22; no data filtered.
Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.
Structured fields
{
"citations": [
{
"url": "https://github.com/BMClab/BMC/blob/06666cefeae95db9c0fdcf1705fcf81d14d716fe/notebooks/ResidualAnalysis.ipynb",
"note": "clinicalgaitanalysis.com cutoff FAQ; BMClab notebook"
},
{
"url": "https://clinicalgaitanalysis.com/faq/cutoff.html",
"note": "clinicalgaitanalysis.com cutoff FAQ; BMClab notebook"
},
{
"url": "https://pure.psu.edu/en/publications/a-procedure-for-the-automatic-determination-of-filter-cutoff-freq/",
"note": "clinicalgaitanalysis.com cutoff FAQ; BMClab notebook"
}
]
}Evidence claims
- [sourced_fact] There is no single correct cutoff for noisy motion data: Winter-style residual analysis gives a starting point but is known to oversmooth, and the author of the commonly copied 0.05 cm threshold warned it was never meant to be used out of context; compute a cutoff as a first guess and check velocities/accelerations on your own data. · locator: clinicalgaitanalysis.com cutoff FAQ; BMClab notebook source
Rights
| component | license | hosting | redistribution | modification | training | Evidence and notes |
|---|---|---|---|---|---|---|
| documentation | unknown | permitted | permitted | unknown | unknown | Applies to this original summary only, not to the cited sources. |