The human voice frequency range typically spans from about 85 Hz to 255 Hz for male voices and from about 165 Hz to 255 Hz for female voices. However, the fundamental frequencies (the lowest frequency of a complex sound) of most adult male voices fall between 85 Hz and 180 Hz, while female voices usually range between 165 Hz and 255 Hz.
In terms of harmonics, the complete vocal range can extend much higher, often reaching up to 3,000 Hz or more, especially for singing, where overtones can be produced.
The average speaking voice usually operates within the 300 Hz to 3,000 Hz range, which is critical for human speech intelligibility.
