![]() ![]() Praat: (vowels) 14.45 dB Praat: (rainbow) 9.33 dB Results Experiment 1 identified CPP cutoff values of 11.46 dB (ADSV) and 14.45 dB (Praat) for the sustained /a/ vowels and 6.11 dB (ADSV) and 9.33 dB (Praat). The current work in our lab replicated Murton and colleagues findings in Praat. Cepstral Peak Prominence (CPP) is an acoustic measure of dysphonia recommended by an ASHA expert panel. We examined the the six CAPE-V sentences from 266 adults with and without voice disorders selected from the Perceptual Voice Qualities Database and found a cutoff CPP value of 9.52 dB. A lower CPP value is associated with a more dysphonic voice. We also implemented a voice detection process to select only the voiced segments of speech for analysis, as some programs use voice detection and others do not. Using voice detection, our CPP cutoff value was 12.15 dB. One of the most important factors to consider when using CPP is consistency!! Below we have made available our Praat scripts to calculate CPP with and without voice detection. Predicting voice disorder status from smoothed measures of cepstral peak prominence using Praat and Analysis of Dysphonia in Speech and Voice (ADSV). ![]() As Praat is a free program and this script adapts to other open-source information, we hope this script will be helpful for both clinic and research. ![]()
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