Matlab tools for pathological voice analysis. Currently the toolset is under development.

• Jitter::local
• Jitter::RAP
• Jitter::PPQ5
• Jitter::PPQ55
• Shimmer::local
• Shimmer::APQ3
• Shimmer::APQ5
• Shimmer::APQ11
• Shimmer::APQ55
• DPF – directional perturbation factor
• PFR – phonatory frequency range
• PPE - pitch period entropy (based on the work of Max A. Little)
• PVI - pathological vibrato index (original feature for ALS detection, see details in [Vashkevich-21])
• Suprasegmental MFCCs
• Harmonics parameters of sustain vowels (introduced in [Vashkevich-21])

An example of calculation of perturbation features can be found in feature_extraction_example.m.

An example of calculation of suprasegmantal MFCC can be found in mfcc_example.m. The result of analysis is given below.

The repository contains folder https://github.com/Mak-Sim/Troparion/tree/master/SPA2019 with database and supplementary information to paper M. Vashkevich, Yu. Rushkevich, A. Petrovsky "Bulbar ALS Detection Based on Analysis of Voice Perturbation and Vibrato," Proceedings of inter. conf. Signal Processing: Algorithms, Architectures, Arrangements, and Applications (SPA), Poznan, Poland, 18-20 Sept. 2019. – P. 267-272.