Cepstral peak prominence: a more reliable measure of dysphonia.
Quantification of perceptual voice characteristics allows the assessment of voice changes. Acoustic measures of jitter, shimmer, and noise-to-harmonic ratio (NHR) are often unreliable. Measures of cepstral peak prominence (CPP) may be more reliable predictors of dysphonia. Trained listeners analyzed voice samples from 281 patients. The NHR, amplitude perturbation quotient, smoothed pitch perturbation quotient, percent jitter, and CPP were obtained from sustained vowel phonation, and the CPP was obtained from running speech. For the first time, normal and abnormal values of CPP were defined, and they were compared with other acoustic measures used to predict dysphonia. The CPP for running speech is a good predictor and a more reliable measure of dysphonia than are acoustic measures of jitter, shimmer, and NHR.
Heman-Ackah
Yolanda D
YD
The Voice Center, Department of Otolaryngology-Head and Neck Surgery, University of Illinois at Chicago, Chicago, Illinois 60612, USA.
Heuer
Reinhardt J
RJ
Michael
Deirdre D
DD
Ostrowski
Rosemary
R
Horman
Michelle
M
Baroody
Margaret M
MM
Hillenbrand
James
J
Sataloff
Robert T
RT
D000368:Aged; D000369:Aged, 80 and over; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015588:Observer Variation; D012372:ROC Curve; D012016:Reference Values; D012680:Sensitivity and Specificity; D012720:Severity of Illness Index; D013061:Speech Acoustics; D013997:Time Factors; D014832:Voice Disorders / Q000175:diagnosis* / Q000453:epidemiology; D014833:Voice Quality