What is the long time constant associated with an LFF setting?

The long time constant associated with a Low Frequency Filter (LFF) setting pertains to how effectively the filter can attenuate rapid fluctuations in a signal while allowing lower frequency components to pass through. A lower frequency setting, such as an LFF of 0.1 Hz, corresponds to a longer time constant, which effectively smooths out high frequency noise and helps in tracking slow changes in the signal over time.

In physiological monitoring and EEG studies, an LFF of 0.1 Hz is specifically chosen to ensure that slow waveforms and trends are adequately captured, while minimizing the impact of higher frequency artifacts. This is particularly relevant for capturing brain activity and other signals without losing essential information. Consequently, settings that indicate higher frequencies, such as the options referring to HFF (High Frequency Filter), do not represent long time constants since they would filter out low frequency components, contrary to what is needed for analyzing slower changes in the signal.