One of the types of objects in Praat. A Formant object represents spectral structure as a function of time: a formant contour. Unlike the time-stamped FormantGrid object, it is sampled into a number of frames centred around equally spaced times, Each frame contains frequency and bandwidth information about several formants.
Inside a Formant object
With Inspect, you will see the following attributes:
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xmin
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start time, in seconds.
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xmax
-
end time, in seconds.
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nx
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the number of frames (≥ 1).
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dx
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time step = frame length = frame duration, in seconds.
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x1
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the time associated with the first frame, in seconds. This will usually be in the range [xmin, xmax]. The time associated with the last frame (i.e., x1 + (nx – 1) dx)) will also usually be in that range.
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framei, i = 1 ... nx
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the frames (see below).
Attributes of a formant frame
Each framei contains the following attributes:
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intensity
-
an indication of the maximum intensity (a squared sound amplitude) in this frame.
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nFormants
-
the number of formants in this frame (usually between 2 and 6).
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formantj, j = 1 ... nFormants
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the information about each formant (see below).
Attributes of each formant
Each formantj contains the following attributes:
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frequency
-
the formant's centre frequency (in Hz).
-
bandwidth
-
the formant's bandwidth (in Hz).
See also
Linear Prediction
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