Low-pass filter

Definition: Low-pass filters are used to keep signal frequencies below a certain frequency threshold by attenuating signals above this threshold. As low-pass filters remove high-frequency content of a given signal (e.g., cardiac oscillations or instrument noise) they have the effect of smoothing the signal.Definition: Low-pass filters are used to keep signal frequencies below a certain frequency threshold by attenuating signals above this threshold. As low-pass filters remove high-frequency content of a given signal (e.g., cardiac oscillations or instrument noise) they have the effect of smoothing the signal.

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References: Luck, S. J. (2014). An introduction to the event-related potential technique. MIT press.

Related terms: High-pass filter, Band-pass filter, preprocessing, noise