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Cepstral Peak Prominence in Nondysphonic Children Using Praat and Analysis of Dysphonia in Speech and Voice

Ashwini Joshi1,2, Shaheen N Awan3, Marianna Rubino1

  • 1Department of Communication Sciences and Disorders, University of Houston, TX.

Journal of Speech, Language, and Hearing Research : JSLHR
|July 2, 2025
PubMed

Insights

Cepstral peak prominence (CPP) increases with age in children, particularly after puberty. However, fundamental frequency (F0) changes, especially decreases postpuberty, significantly influence CPP, impacting normative expectations.

Area of Science:

  • Speech Science
  • Acoustic Phonetics
  • Child Development

Background:

  • Cepstral peak prominence (CPP) is a measure of voice quality.
  • Understanding normative CPP values in children is crucial for identifying voice disorders.
  • The influence of age and sex on CPP in children requires further investigation.

Purpose of the Study:

  • To examine the effect of age on CPP in nondysphonic children aged 3 to 17.
  • To establish normative CPP estimates for different age groups and sexes.
  • To investigate the influence of sex, software, and stimuli on CPP, and the role of fundamental frequency (F0).

Main Methods:

  • Collected CPP and F0 data from 103 children (3-17 years) for the vowel /a/ and an all-voiced sentence.
  • Utilized two software programs: Analysis of Dysphonia in Speech and Voice (ADSV) and Praat.
  • Employed analyses of variance, correlations, and stepwise multiple regression to analyze data.

Main Results:

  • A significant correlation between age and CPP was observed, with notable increases in postpubertal children (15-17 years).
  • CPP values varied significantly based on sex, stimuli, and the software used.
  • Both age and F0 were significant predictors of CPP; however, the age-related increase in males was largely attributed to a postpubertal decrease in F0.

Conclusions:

  • CPP generally increases with age in children, with a pronounced rise in postpubertal individuals.
  • Age-based normative CPP expectations should consider the significant impact of F0 changes, especially the postpubertal decline.
  • Variations in CPP due to sex, stimuli, and analysis software highlight the need for context-specific interpretation.
Abstract

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