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. Author manuscript; available in PMC: 2016 Nov 1.
Published in final edited form as: J Voice. 2015 May 2;29(6):670–681. doi: 10.1016/j.jvoice.2014.11.005

TABLE 3.

Summary of logistic model fits of CP and CPP vs. SNR (N = 2871 samples) for the noisy vocal tract model experiment and various cepstrum estimators. Results are ranked by coefficient of determination R2.

R2 min max slope mid
Ideal Interpolated Cepstrum CP, Hann 0.979 0.015 1.68 0.065 55.4
Hillenbrand CPP 0.921 8.5 32.8 0.083 29.5
Hillenbrand CP dB 0.912 89.8 110.2 0.092 25.1
Ideal Interp. Cepstrum CP, Hamming 0.900 0.031 0.73 0.087 39.3
Hillenbrand CP 0.867 0.087 0.24 0.093 30.4
KayPENTAX CPP 0.817 1.3 14.9 0.11 15.9
Interpolated Cepstrum CP, Hann 0.791 0.041 1.08 0.079 43.7
Interpolated Cepstrum CP, Hamming 0.778 0.047 0.67 0.10 33.1
Ideal Interp. Cepstrum CP, Rectangular 0.673 0.024 0.29 0.089 29.9
Interpolated Cepstrum CP, Rectangular 0.478 0.034 0.19 0.098 21.7