Figure 7
From: Comparison of Linear Prediction Models for Audio Signals
Warped LP model of synthetic audio signal plus noise (SNR  = 25 dB) with order 
, warping parameter 
, and autocorrelation method: (a) Noisy synthetic audio signal magnitude spectrum (warped scale), (b) PEF pole-zero plot (warped scale), (c) PEF magnitude response (warped scale), (d) PEF pole-zero plot (original scale), (e) PEF magnitude response (original scale).