The LP spectrum

The transfer function 1/H(z) is a FIR whitening filter for the speech. The frequency response for this can be computed as the FT of the filter coefficients, then inverted to give the frequency response of H(Z). Figure 39 shows the LP spectrum for the example segmetn of speech.

  
Figure 39: The LP spectrum

Matlab:

Note:

• The formants are very peaked