seewave (version 1.6.4)

H: Total entropy

Description

This function estimates the total entropy of a time wave.

Usage

H(wave, f, wl = 512, envt="hil", msmooth = NULL, ksmooth = NULL)

Value

• A single value varying between 0 and 1 is returned. The value has no unit.

Details

This function computes the product between the values obtained with sh and th functions. This then gives a global (time and frequency) estimation of signal entropy. The frequency mean spectrum and the amplitude envelope needed for computing respectively sh and th are automatically generated. They can be controlled through wl and smooth arguments respectively. See examples below and examples in sh and th for implications on the results.

References

Sueur, J., Pavoine, S., Hamerlynck, O. & Duvail, S. (2008) - Rapid acoustic survey for biodiversity appraisal. PLoS ONE, 3(12): e4065.

See Also

sh, th, csh

Examples

data(orni)
H(orni,f=22050)
# changing the spectral parameter (wl)
H(orni,f=22050,wl=1024)
# changing the temporal parameter (msmooth)
H(orni,f=22050,msmooth=c(20,0))