Band-limited tremor amplitude (RMS)

Band-pass filters the signal to the tremor band and returns its root-mean- square amplitude (in the units of the input signal).

Usage

tremorAmplitude(signal, sampling_rate, band = c(3, 12), order = 4)

Arguments

signal

Numeric movement signal.

sampling_rate

Sampling rate in Hz.

band

Length-2 tremor band c(low, high) in Hz (default c(3, 12)).

order

Butterworth filter order (default 4).

Value

A list with rms and the band used.

See also

tremorSpectrum(), tremorMetrics()

Examples

fs <- 100; t <- seq(0, 20, by = 1 / fs)
tremorAmplitude(2 * sin(2 * pi * 5 * t), fs)$rms   # ~ 2 / sqrt(2)
#> [1] 1.411585