powertrack: Power tracking

In phonTools: Tools for Phonetic and Acoustic Analyses

Power tracking

Description

Create a power track for a sound.

Usage

powertrack (sound, timestep = 5, windowlength = 30, 
            fs = 22050, show = TRUE, zeromax = TRUE, ...)

Arguments

sound	A numeric vector representing a waveform, or a 'sound' object created with the loadsound() or makesound() functions.
timestep	Determines how far the window will be moved for each adjacent analysis, in milliseconds.
windowlength	Determines how much of the signal is included for each analysis step, in milliseconds. If this is too small, pitch-synchronous ripples will be seen in the track.
fs	The sampling frequency of the sound. If a 'sound' or 'ts' object is passed, this does not need to be specified.
show	If TRUE, the track is plotted.
zeromax	If TRUE, the maximum dB value is set to zero.
...	Additional parameters are passed to the internal call of plot(), and used to create the figure.

Details

Returns the average power in the signal in a section as determined by the parameters of the function. A Hann window is applied to each section prior to analysis. Sections with zero power are ignored and not returned.

Value

A dataframe with the following columns:

time	The time, in milliseconds, of each point of analysis.
power	The power, in decibels, at each analysis point.

Author(s)

Santiago Barreda <[e-mail]>

Examples

## plot the waveform and power of a given sound.
#data (sound)
# sound = loadsound()        ## run this line to use you own sound

## compare waveform and power
#par (mfrow = c(2,1), mar = c(4,4,1,1));
#plot (sound)
#powertrack (sound)

phonTools documentation built on Nov. 21, 2023, 1:07 a.m.