Fundamental Frequency (F0) Analyzer

Pitch analysis with profile-based classification and musical note conversion.

Created by: Renato Passos, Eng. de Software
Reviewed by: Renato Passos, Eng. de Software

Last updated: Apr 18, 2026

Clinical disclaimer for professionals and patients. The protocols used (Behlau, Hirano, ASHA, IALP and peer-reviewed equivalents) are references from scientific literature adapted to digital format. See full disclaimer

About this tool

Frequência fundamental (F0): pitch médio da voz em Hz. Classificação por perfil etário/sexo + conversão para nota musical.

Clinical disclaimer for professionals and patients

The protocols used (Behlau, Hirano, ASHA, IALP and peer-reviewed equivalents) are references from scientific literature adapted to digital format. This tool is a screening aid, not a replacement for in-person speech-language assessment. A licensed speech-language pathologist (ASHA-certified in the US, HCPC-registered in the UK, or equivalent EU professional order) must complement it with qualitative analysis and patient history. All voice and clinical data is processed only on your device.

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