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:
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xmin
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the bottom of the frequency domain, in hertz. Usually 0.
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xmax
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the top of the frequency domain, in hertz.
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nx
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the number of frequency bins (≥ 1).
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dx
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the frequency step, or bin width, in hertz.
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x1
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the frequency associated with the first bin, in hertz. Usually equals dx / 2, because the first bin tends to start at 0 hertz.
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z1i, i = 1 ... nx
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the power spectral density, expressed in dB.
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© Paul Boersma 2007-03-20