Phonetic Analyzer

Acoustic phonetics is the study of the physical properties of speech sounds such as frequency, amplitude, and duration. Researchers and students typically rely on tools like Praat to analyze these properties.

As a typical native application, Praat requires installation and can only run on desktop operating systems. To make Praat's functionality more accessible and fully platform-independent, I started building the online version of the program.

This web-based phonetic analyzer uses parts of Praat's codebase compiled to WebAssembly (WASM) to perform phonetic analysis locally in your browser. With this more accessible and convenient way to analyze the physical properties of speech sounds, you can explore and study phonetic features on any device including smartphones and tablets.

Using this tool, you can record or upload audio files, visualize spectrograms, measure pitch and intensity, and calculate formant frequencies.


The waveform of the audio file.
The analyses of the audio file.
Display options
This shows a spectro-temporal representation of the sound. The vertical direction of the spectrogram represents frequency which ranges from 0 at the bottom to 5000 Hz at the top. The darkness of the pixels represents the energy density.
This shows the pitch contour of the sound. The pitch range is from 75 Hz to 500 Hz.
This shows the intensity contour of the sound. The view range is from 50 dB to 100 dB.
This shows the formants of the sound, i.e. the concentration of energy in the frequency spectrum.

See also

Made by Anton Vasetenkov.

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