Ltas

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

- Ltas: Average
- Ltas: Get bin number from frequency...
- Ltas: Get bin width
- Ltas: Get frequency from bin number...
- Ltas: Get frequency of maximum...
- Ltas: Get frequency of minimum...
- Ltas: Get highest frequency
- Ltas: Get lowest frequency
- Ltas: Get maximum...
- Ltas: Get mean...
- Ltas: Get minimum...
- Ltas: Get number of bins
- Ltas: Get standard deviation...
- Ltas: Get value at frequency...
- Ltas: Get value in bin...
- Sound: To Ltas (pitch-corrected)...
- Spectrum: To Ltas (1-to-1)
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