Amplitude filter
This function deletes all signal which amplitude is below a selected threshold.
afilter(wave, f, channel = 1, threshold = 5, plot = TRUE, listen = FALSE, output = "matrix", ...)
wave |
an R object. |
f |
sampling frequency of |
channel |
channel of the R object, by default left channel (1). |
threshold |
amplitude threshold (in %). |
plot |
logical, if |
listen |
if |
output |
character string, the class of the object to return,
either |
... |
other |
The threshold value is in % relative to the maximal value
of wave. Signal inferior to this value is clipped.
If plot is FALSE, a new wave is returned. The class
of the returned object is set with the argument output.
Jerome Sueur sueur@mnhn.fr
data(orni) op<-par(mfrow=c(2,1)) afilter(orni,f=22050) title(main = "threshold level = 5") afilter(orni,f=22050,threshold=0.5,colwave="blue") title(main = "threshold level = 0.5") par(op)
Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.