Acoustic Voice Analysis Calculators

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

• Voice Analysis Software for Speech-Language Pathologists

  Online voice analysis software for speech-language pathologists: a guided voice assessment, AVQI, CPP, jitter, shimmer and HNR computed with Praat, and a report you can export.

• AVQI Calculator (Acoustic Voice Quality Index)

  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)

  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

  Calculate jitter and shimmer from a sustained vowel online. What they measure, the usual reference values (1.04% and 3.81%) and why Praat gives lower figures.

• HNR (Harmonics-to-Noise Ratio): Meaning and Calculator

  HNR (harmonics-to-noise ratio) compares the periodic energy of the voice with its noise, in dB. What it means, typical values (about 21–24.5 dB) and how to measure it online.

• 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.

• Pitch (F0) Extractor — Extract a Pitch Curve from Any Audio File

  Online pitch (F0) extractor: upload an audio file and get a time-stamped pitch curve in Hz, exportable as CSV — for voice analysis, singing practice or audio production workflows.

• Pronunciation Assessment API

  REST API that scores a recording against the text it should match: accuracy, fluency, completeness and prosody from 0 to 100, per word and per phoneme. Billed by the second of audio.

• Voice Analysis API

  REST API for clinical acoustic voice measures: AVQI, ABI, CPP, jitter, shimmer, HNR, DSI, GNE and more, computed as on the Vocametrix website. Billed by the second of audio.