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Summary

Computer analysis of voice parameters using lingWAVES and rpSzene® showed significant differences. Vocal analysis results from different systems are not directly comparable, necessitating standardized perturbation measurements for clinical use.

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Area of Science:

  • Speech and Language Pathology
  • Acoustic Analysis
  • Biomedical Engineering

Background:

  • Computer-supported systems offer objective vocal ability assessment.
  • Multiple commercial systems are available for voice analysis.
  • The comparability of results between different systems is unclear.

Purpose of the Study:

  • To compare vocal ability parameter measurements between two commercial systems: lingWAVES and rpSzene®.
  • To assess the consistency and comparability of jitter, shimmer, and glottal-to-noise excitation ratio (GNE) results.
  • To determine if results from one voice analysis method are replaceable by or directly comparable with another.

Main Methods:

  • A prospective study involving 30 participants (15 women, 15 men) aged 18-56 years.
  • Simultaneous recording of voice signals for analysis with lingWAVES and rpSzene®.
  • Statistical comparison using correlation coefficients, Youden plots, and Bland-Altman plots.

Main Results:

  • Neither system's results followed a normal distribution.
  • The consistency between the lingWAVES and rpSzene® programs was unsatisfactory.
  • Significant variations in measured vocal parameters were observed between the two systems.

Conclusions:

  • Despite simultaneous recording, absolute equivalency was not achieved.
  • The significant variation in results prevents proper comparison between the two voice analysis methods.
  • Development of perturbation measurements with good clinical applicability and inter-system comparability is needed.