Free Acoustic Voice Analysis Calculators

Run the most common acoustic voice measures online, without Praat scripting. Each calculator is free, works from a short recording, and exports results into your clinical notes.

• AVQI Calculator (Acoustic Voice Quality Index)

  Free online AVQI (Acoustic Voice Quality Index) calculator for speech-language pathologists. Measure overall dysphonia severity from sustained vowel and connected speech — no Praat scripting required.

• CPP Calculator (Cepstral Peak Prominence)

  Free online CPP (Cepstral Peak Prominence) calculator. Measure this robust acoustic correlate of dysphonia and breathiness from a voice recording — no Praat scripting needed.

• Jitter & Shimmer Calculator

  Free online jitter and shimmer calculator. Measure cycle-to-cycle frequency and amplitude perturbation of the voice from a sustained vowel — no Praat scripting required.

• HNR Calculator (Harmonics-to-Noise Ratio)

  Free online HNR (Harmonics-to-Noise Ratio) calculator. Quantify the ratio of harmonic to noise energy in the voice as a marker of vocal clarity — no Praat scripting needed.

• Acoustic Voice Analysis Online — a Praat Alternative

  A simpler alternative to Praat scripting: run acoustic voice analysis online (AVQI, CPP, jitter, shimmer, HNR, formants and more) directly in your browser, built for speech-language pathologists.