Acoustic Voice Analysisfor Speech Pathologists
Professional-grade acoustic measurement tools built on 30+ years of voice research. Start free with 10 analyses per month.
Validated against Praat • HIPAA aware by design • Pro plans for unlimited use
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. Suitable 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.
HIPAA-Safe by Design
Built to minimize exposure to protected health information. Patient identifiers and analysis results are not stored on our servers. Designed for privacy-sensitive clinical workflows.
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
- • F3 Gender Assessment:
AVQI & ABI Calculator
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
MPT & DSI Calculator
Measure Maximum Phonation Time and calculate Dysphonia Severity Index using the validated Wuyts et al. (2000) protocol.
- • Maximum Phonation Time
- • Dysphonia Severity Index
- • Component breakdown
Spectral Analysis
Analyze spectral voice characteristics including LTAS, Alpha Ratio, and CSID using validated clinical protocols.
- • Long-Term Average Spectrum
- • Alpha Ratio (spectral tilt)
- • CSID (Awan & Roy, 2012)
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. Built on 30+ years of voice research, it provides reliable measurements that support clinical documentation and workflow—with a generous free tier and affordable Pro options.
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