How the Voice Gender Detector Works
Two independent acoustic properties are measured, and the result combines both rather than relying on pitch alone.
Fundamental frequency (F0) is how fast your vocal folds open and close, and it is what you perceive as pitch. Averaged across a sentence, typical adult masculine voices centre roughly around 85 to 155 Hz and typical feminine voices roughly around 165 to 255 Hz. These are population averages with wide individual spread and a real overlap between them.
Formants are the resonant frequencies of your vocal tract — the throat and mouth cavity above the vocal folds. Their positions depend mainly on the length of that tract, which is on average shorter in feminine anatomy, pushing resonances higher. The tool extracts the first two, F1 and F2, using LPC spectral envelope analysis on a downsampled copy of your signal.
The two lines of evidence are combined with pitch weighted at 68% and formants at 32%. The reason for measuring both is concrete: pitch alone systematically misreads two common cases. A masculine voice in falsetto has a high F0 but retains long-vocal-tract resonance, and a naturally low feminine voice has the opposite pattern. Formants catch both.
Reading Your Result
You get three numbers rather than a single label, because a single label would hide how the conclusion was reached.
The androgynous band is not a hedge. Human voices do not fall into two separated clusters; the distributions overlap in the middle, and voices in that region are accurately described as sitting between the two poles.
Using It for Voice Training
Many people arrive at a tool like this while working on their speaking voice, whether for gender-affirming voice training, acting, or professional presentation. Used carefully it is genuinely helpful, and there are three things worth knowing.
Watch resonance, not just pitch. Raising pitch alone is the most common early approach and it produces the least convincing result, because listeners respond strongly to vocal tract resonance. In the raw measurements panel, F1 and F2 are the resonance figures. Pitch usually shifts first during training while formants follow more slowly, so a rising percent-feminine score with flat formants tells you where to direct the next stage of practice.
Keep conditions identical. Same room, same device, same distance, same passage read aloud, ideally the same time of day. Formant estimates in particular are sensitive to microphone placement, and a change of setup can produce an apparent shift that is entirely artefact.
Never push into strain. No number on any website is worth an injured voice. Pitch reached by squeezing rather than by adjusting resonance shows up here as rising jitter and falling harmonic-to-noise ratio, so if your gender reading improves while those two deteriorate, that is a warning sign worth respecting. Working with a speech-language pathologist or a qualified voice teacher is the safe path; this tool is a mirror between sessions, not a substitute for one.
Honest Limits
This is a description of sound, not a statement about identity. Acoustic measurements describe how a voice resonates, and nothing more. A voice reading as masculine or feminine on an acoustic scale says nothing whatsoever about who its owner is.
The underlying reference ranges also come from population averages that vary by language, accent, age and individual anatomy. Children's voices sit high regardless of gender. Age shifts everything: feminine voices tend to lower gradually through adulthood while masculine voices dip and then rise again later in life. And a heavy cold can move both pitch and formants enough to change a borderline result.
Finally, a single five-second take is a snapshot. Read a sentence in your ordinary relaxed voice rather than performing one, record two or three times, and treat the middle result as the representative one.
If you want the full picture instead of just the gender read-out, the main voice rater gives you a 1-10 score and a voice age estimate from the same five-second recording.
Frequently Asked Questions
How does a voice gender detector work?
Two acoustic properties do the work. The first is fundamental frequency, the rate your vocal folds vibrate, which differs on average between typical masculine and feminine voices. The second is formant frequencies, the resonances of your vocal tract, which depend on its length. Both are measured on your device and combined, with pitch weighted at 68% and resonance at 32%.
Why does it say androgynous?
Because your voice genuinely sits in the overlap region, roughly 155 to 175 Hz, where masculine and feminine voice distributions cross. That is a real acoustic finding rather than the tool failing. The confidence figure shown alongside tells you how close to the boundary you are.
Is a voice gender detector accurate?
For voices well away from the middle it is reliable, because pitch and formant differences there are large and consistent. Near the boundary no acoustic method can be definitive, since the underlying distributions genuinely overlap. It describes how a voice sounds acoustically, which is not the same thing as identity.
Can I use this for voice training?
Yes, and it is one of the more useful applications, provided you track resonance and not only pitch. Keep your recording conditions identical between sessions and watch the formant figures in the raw measurements panel alongside the pitch figure, since resonance often lags behind pitch during training.
What pitch counts as a feminine voice?
Typical adult feminine speaking voices centre around 165 to 255 Hz and typical masculine ones around 85 to 155 Hz, with substantial individual variation and a genuine overlap zone between them. Pitch alone is not decisive, which is exactly why formants are measured too.
Is my recording uploaded?
No. Everything is analysed locally in your browser. No audio is transmitted, stored or retained anywhere.