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NSR (dB) CASE# - SORTED BY ASCENDING ORIGINAL NSR Figure Cepstral NSR measurements for six combinations of AM and FM demodulation. The horizontal axis is case number when cases are sorted by original voice NSR. Curves fall into 3 groups: original voice and original voice AM demod. (top pair), tremor demod. and tremor plus AM demod. (middle pair), and all FM demod. and all FM demod. plus AM demod. (bottom pair). AM modulation appears to have a minimal effect. LEGEND ORIGINAL (TOP) ORIGINAL, AM RMVD TREMOR RMVD (MIDDLE) TERMOR RMVD, AM REMVD ALL FM RMVD (BOTTOM) ALL FM RMVD, AM REMVD
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Figure 2.30a. PSD of original voice.
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Figure 2.30e. Orig. PSD, aspiration PSD, and vocal tract.
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Figure 2.30f. Source aspiration PSD with vocal tract removed and fitted to 25-point piecewise-linear model.
Peaks removed here
Original. Spectrum
Nonperiodic Spectrum
Vocal tract Transfer Function
Aspiration Spectrum
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0 0Figure 2.30c. Cepstrum (expanded scale). Figure 2.30d. Comb-liftered cepstrum of 2.30c.
0Figure 2.30b. Cepstrum of original voice.
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Figure 2.31. Power spectra of original voice (top), voice with FM tremor removed (middle), and voice with all FM removed (bottom).
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CASE# - SORTED BY ASCENDING ORIGINAL NSR
Figure 2.32. Cepstral NSR measurements for six combinations of AM and FM demodulation. The horizontal axis is case number when cases are sorted by original voice NSR. Curves fall into 3 groups: original voice and original voice AM demod. (top pair), tremor demod. and tremor plus AM demod. (middle pair), and all FM demod. and all FM demod. plus AM demod. (bottom pair). AM modulation appears to have a minimal effect.
LEGENDORIGINAL (TOP)ORIGINAL, AM RMVDTREMOR RMVD (MIDDLE)TERMOR RMVD, AM REMVD
ALL FM RMVD (BOTTOM)ALL FM RMVD, AM REMVD