Clinical Voice Analysisfor Speech Pathologists
Professional-grade acoustic measurement tools built on 30+ years of voice research, completely free
No signup required • Free core features • Validated against Praat
Built for Clinical Workflow
Research-Validated Accuracy
All measurements validated against Praat, the gold standard in voice research. Built on algorithms from peer-reviewed publications with documented accuracy.
Works with Any Recording
No format conversion needed. Upload recordings directly from smartphones, tablets, or professional equipment. Supports WAV, MP3, M4A and many more formats.
Professional PDF Reports
Generate comprehensive reports instantly. Perfect for clinical documentation, insurance purposes, and sharing with referring physicians.
Cloud-Based & Accessible
Access from any device, anywhere. No expensive software to install or maintain. Perfect for telehealth sessions and on-the-go assessments.
Research-Driven Development
Developed from 30+ years of research in vocal fold dynamics and acoustic analysis. New tools and measures added continuously.
Free Core Features
All essential voice analysis tools are free to use. No trial periods, no feature walls. Professional-grade analysis accessible to everyone.
Professional Acoustic Analysis Tools
Research-grade measurements for clinical documentation and workflow support
Voice Analyzer
Comprehensive acoustic measurements including F0, jitter, shimmer, HNR, and CPPS. Upload audio and get instant results with professional reports.
- • F0, Jitter, Shimmer, HNR, CPPS
- • Normative data comparison
- • Instant PDF reports
Pitch Visualizer
Real-time pitch visualization with gender perception ranges. Ideal for voice therapy documentation and gender-affirming voice work.
- • Real-time pitch tracking
- • Gender perception ranges
- • Musical scale reference
AVQI & ABI Calculator
The only free web-based AVQI and ABI calculator. Multiparametric voice quality assessment validated for Brazilian Portuguese (Englert 2021).
- • AVQI (Acoustic Voice Quality Index)
- • ABI (Acoustic Breathiness Index)
- • Validated cutoff values
Spectrogram
Generate wideband and narrowband spectrograms with aligned waveforms. Visualize formants, harmonics, and voice quality patterns.
- • Wideband (formant analysis)
- • Narrowband (harmonic analysis)
- • PDF reports with both views
Important: For Clinical Documentation Only
PhonaLab provides acoustic measurements for educational and clinical documentation purposes only. It does not diagnose voice disorders or provide medical advice. All clinical decisions must be made by licensed healthcare professionals. Results should be interpreted in conjunction with comprehensive clinical evaluation.
Built by a Voice Researcher, for Clinicians
PhonaLab was created by Dr. Jorge C. Lucero, a computer science professor at the University of Brasília with over 30 years of experience researching voice production and vocal fold dynamics.
Having developed tools like SimuVox for physics-based voice synthesis, Dr. Lucero understands both the science behind voice production and the practical needs of clinicians working with voice disorders every day.
PhonaLab was designed to make professional-grade acoustic analysis accessible to all clinicians, regardless of budget. The goal is to provide reliable measurements that support clinical documentation and workflow, while keeping the tools free and easy to use.
Credentials
- Professor, University of Brasília (Computer Science)
- 30+ years researching voice production
- 50+ peer-reviewed publications on voice science
- Creator of SimuVox (physics-based voice synthesis)
Why PhonaLab?
- Research-validated algorithms matching Praat accuracy
- No format conversion needed - accepts smartphone recordings
- Free core features - no expensive software licenses
- Instant PDF reports for professional documentation
- New tools and measures added continuously