One of the types of objects in Praat. Ltas is short for Long-Term Average Spectrum.
An object of class Ltas represents the logarithmic power spectral density as a function of frequency, expressed in dB/Hz relative to 2·10-5 Pa.
Inside an Ltas object
With Inspect, you will see the following attributes:
- xmin
- the bottom of the frequency domain, in hertz. Usually 0.
- xmax
- the top of the frequency domain, in hertz.
- nx
- the number of frequency bins (≥ 1).
- dx
- the frequency step, or bin width, in hertz.
- x1
- the frequency associated with the first bin, in hertz. Usually equals dx / 2, because the first bin tends to start at 0 hertz.
- z1i, i = 1 ... nx
- the power spectral density, expressed in dB.
Links to this page
© Paul Boersma 2007-03-20