A query to the selected Formant object for the bandwidth of the specified formant at the specified time.
the estimated bandwidth in hertz or Bark. If Time is not within half a frame width of any frame centre, or If the specified Formant number is greater than the number of formants in the frame, the return value is undefined; otherwise, the formant is considered to belong to the frame whose centre is nearest to the specified time.
If possible (i.e. if the adjacent frame has enough formants), a linear interpolation is performed between the centre of the frame and the centre of the adjacent frame. With Bark units, the hertz-to-Bark transformation is performed on the two frequencies F ± 1/2 B (after interpolation), and the result is the difference between these two values
© ppgb, October 16, 1999