![]() ![]() International Journal of Pediatric Otorhinolaryngology, 116, 107–113. Use of cepstral analysis for differentiating dysphonic from normal voices in children. Validation of the Cepstral Spectral Index of Dysphonia (CSID) as a screening tool for voice disorders: Development of clinical cutoff scores. Quantifying dysphonia severity using a spectral/cepstral-based acoustic index: Comparisons with auditory-perceptual judgements from the CAPE-V. Effects of vocal intensity and vowel type on cepstral analysis of voice. A two-stage cepstral analysis procedure for the classification of rough voices. Experiment 2 provides an initial predictive framework that can be used to relate CPP values to the auditory perception of overall dysphonia severity based on sustained /a/ vowels and Consensus Auditory-Perceptual Evaluation of Voice sentences.Īwan, S. Conclusions The CPP cutoff values identified in Experiment 1 provide normative reference points for clinical voice evaluation based on sustained /a/ vowels and the Rainbow Passage. ![]() In Experiment 2, CPP values estimated ratings of overall dysphonia with r 2 values up to. CPP values below those thresholds indicated the presence of a voice disorder with up to 94.5% accuracy. 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) for the Rainbow Passage. Trained listeners provided auditory-perceptual ratings of overall dysphonia for the recordings, which were estimated using CPP values in a linear regression model whose performance was evaluated using the coefficient of determination ( r 2). Speakers sustained the /a/ vowel and read four sentences from the Consensus Auditory-Perceptual Evaluation of Voice protocol. Experiment 2 analyzed recordings from 32 English speakers with varying dysphonia severity and provided preliminary validation of the Experiment 1 cutoffs. CPP cutoff values that best distinguished patient and control speakers were identified. Objective dysphonia measures in the program Praat: smoothed cepstral peak prominence and acoustic voice quality index The findings of this study demonstrate that the outcomes of the two CPPS-methods and the two AVQI-methods are highly comparable, increasing the clinical feasibility of both methods as measures of dysphonia severity. Speakers produced sustained /a/ vowels and the English language Rainbow Passage. Experiment 1 included recordings from 295 patients with medically diagnosed voice disorders and 50 vocally healthy control speakers. Method CPP was computed using the Analysis of Dysphonia in Speech and Voice (ADSV) program and Praat. Experiment 2 was an initial attempt to estimate auditory-perceptual ratings of overall dysphonia severity using CPP values. Experiment 1 identified CPP values to distinguish speakers with and without voice disorders. ![]() All rights reserved.Purpose The goal of this study was to employ frequently used analysis methods and tasks to identify values for cepstral peak prominence (CPP) that can aid clinical voice evaluation. A larger clinical study should confirm how prosody related SPL and f o and vowel position effects could be controlled for in connected speech samples.Īcoustic analysis Cepstral peak prominence Dysphonia Speech acoustics Voice disorders.Ĭopyright © 2019 The Voice Foundation. Further, the vowel position influenced the present results. In vowel samples from connected speech of adults with voice disorders, we observed better CPP and CPPS in higher voice SPL alone and combined with higher f o. Voice f o, SPL, CPP, and CPPS of the first vowel were all significantly lower than of the last vowel (P ≤ 0.03). Voice SPL as single factor and combined with f o had a highly significant effect (P ≤ 0.001), while f o alone had no significant impact on both CPP and CPPS (P ≥ 0.77). Statistical analysis included Linear Mixed Models with ANCOVA and Bonferroni post hoc tests. Voice f o (Hz), SPL (dBA), CPP (dB), and CPPS (dB) were computed using PRAAT. Five /a/ vowels were manually extracted from stressed syllables in different positions. Recordings of CAPE-V sentences from 27 voice disordered Brazilian Portuguese speakers (19 women, eight men) with a mean age of 45 years (SD = 13) were investigated. The main aim of the present work was to investigate the effects of prosody related SPL and f o variations on cepstral measures in speech of adults with voice disorders. Recent studies indicate that vocal intensity (sound pressure level, SPL) and fundamental frequency (f o) changes may influence cepstral measurement results in healthy speakers. Cepstral peak prominence (CPP) and smoothed CPP (CPPS) have been described as reliable parameters to detect overall dysphonia in standardized connected speech samples. ![]()
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