Three raters provided auditory perceptual ratings of the voice samples using the GRBAS scale (grade) and overall severity for the CAPE-V/Turkish. The voice recordings from all participants included the six CAPE-V/Turkish sentences and sustained vowel /a/. Included subjects had visited the Hacettepe University Hospitals Speech and Language Therapy Department for voice evaluation between January 2017 and September 2021. One hundred ninety-five individuals with voice disorders and an equal number of age and gender-matched individuals without voice disorders were included.

The aims of this study were to determine the cut-off values of cepstral peak prominence, cepstral peak prominence standard deviation, low frequency/ high frequency ratio, low frequency/high frequency ratio standard deviation, and cepstral spectral index of dysphonia for predicting the voice severity within a Turkish speaking population, as well as to confirm the discriminative power of these cut-off values. However, there is an unclarity regarding the results of cepstral analyzes effect in determining the severity of dysphonia. The advantages of cepstral measurements in the evaluation of dysphonia have been noted in previous studies. Its contents are solely the responsibility of the authors and do not necessarily represent the official views of the NIH. This work was supported in part by the NIH National Institute on Deafness and Other Communication Disorders under Grants R33 DC011588 and P50 DC015446 (PI: Hillman) and in part by the Voice Health Institute. The authors acknowledge Melissa Cooke, Amanda Fryd, and Molly Bresnahan for help with signal segmentation. Since popular voice assessment indices incorporate cepstral measures, it is Acknowledgment A similar effect has been reported for cepstral measures derived from phonation in vocally healthy individuals and is reproduced here in a group of patients diagnosed with hyperfunctional voice disorders.

In a group of women with and without a voice disorder, the acoustic measure of smoothed CPPS was significantly affected by the sound pressure level of the vowel produced. As with previous studies of perturbation measures, it is hypothesized that the observed strong effect of voice SPL on CPPS will be present in multiparametric indices incorporating CPPS, such as the cepstral-spectral index of CONCLUSION Although both voice SPL and f o exhibited statistically significant effects on CPPS, the effect of f o was far less strong. In the present study, CPPS increased with increasing voice intensity in sustained vowels of both female speakers with and without a voice disorder. The loudness condition had a highly significant effect on DISCUSSION When assessed as single factors, both SPL and f o had highly significant main effects on CPPS in the patient and control groups ( P ≤ 0.001). Table 3 reports the results of the LMM model. Signal stability criteria led to the inclusion of an unequal number of recordings per loudness condition in the patient group. Table 2 reports group-wide descriptive statistics for mean vocal SPL, mean f o, and CPPS within the patient and control groups. Each patient was paired with a vocally healthy control Effects of SPL, f o, and loudness condition on CPPS

36 Laboratory voice recordings were analyzed from 58 patients diagnosed with phonotraumatic vocal hyperfunction (67.2% with vocal fold nodules, 8.6% with polyps) or nonphonotraumatic vocal hyperfunction (24.1% with muscle tension dysphonia, MTD). In a retrospective matched case-control study, data from 116 adult women aged between 18 and 64 years was drawn from a larger project studying vocal hyperfunction using ambulatory voice monitoring. For clinical voice assessment, cepstrum-based measures have been reported to be reliable indicators of dysphonia, Study design and subject characteristics 1 Cepstral measures estimate the proportion of periodic energy based on a power spectrum, 2 and thereby indicate the harmonic organisation of an acoustic signal. Recent recommendations for a comprehensive standard voice assessment include the cepstrum-based acoustic voice measure cepstral peak prominence (CPP) to objectively describe voice quality in sustained vowels and speech.

Cepstral voices discount