Cepstral Peak Prominence Smoothed - CPPS and Acoustic Voice Quality Index - AVQI in healthy and altered children's voices: comparation, relationship with auditory-perceptual judgment and cut-off points.
Evelyn Carla Dos Santos Rabelo, Ana Paula Dassie-Leite, Vanessa Veis Ribeiro and 2 others
PMID 38808777WHAT IT FOUND
Acoustic measures CPPS and AVQI successfully distinguish healthy from deviated voices in children.
Children with voice disorders had lower CPPS and higher AVQI scores. The study provides specific cut-off values for these tests to help clinicians identify vocal issues in pediatric patients.
Key findings
01Children with vocal deviations showed lower CPPS values and higher AVQI values compared to those without deviations.
02The study established cut-off points for identifying deviated voices: 14.07 for CPPS vowel, 7.62 for CPPS numbers, and 2.05 for AVQI.
03Perceptual judgment of the sustained vowel task predicted all three acoustic measures, while the counting task predicted only AVQI and CPPS numbers.
STILL TO COME
How it was doneWhat they foundWhat it means for SLPs
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What it does not show
The study did not subdivide children by age group, which is relevant given developmental vocal changes. The counting task used numbers 1 to 10, whereas the validated AVQI protocol for Brazilian Portuguese recommends 1 to 11. The sample was recruited from a hospital setting while awaiting appointments, which may not represent the general population. No laryngeal imaging was reported to confirm structural status, relying on perceptual judgment and screening criteria.
Declared interests
Nothing to declare regarding financial support or conflicts of interest.
The easy way to misread this
Do not interpret these cut-off points as definitive diagnostic criteria for all pediatric populations. The values are specific to Brazilian Portuguese speakers and the tasks used, and the study design is cross-sectional, not longitudinal.