About the Tool
What does the Voice Frequency Test measure? The tool measures the fundamental frequency (F0) of your voice in real time — the rate at which your vocal folds vibrate during voiced sound production, expressed in Hertz (Hz). It captures live microphone audio via the Web Audio API, performs FFT analysis to identify the dominant frequency components in your voice signal, applies autocorrelation-based detection to find the true fundamental, and displays the result in Hz alongside the nearest musical note. For the complete technical pipeline, see the How It Works page.
Why do I need to give microphone permission? The tool captures your voice through the microphone to perform live frequency analysis. Without microphone access there is no audio signal to analyse. Your microphone audio is processed entirely within your browser using the Web Audio API — it is never recorded, never stored, and never transmitted to any server. See the Data Security page for the full explanation.
What should I do to get a stable reading? Sustain a vowel sound — “aah,” “eee,” or “ooh” — clearly and steadily at a comfortable pitch. The tool requires at least 100–200 ms of continuous voiced sound to produce a reliable F0 reading. Brief sounds, whispers, breathy phonation, and background noise all reduce detection reliability. A quiet room, a functional microphone, and a sustained voiced sound give the best results.
Can I use the tool to measure my speaking pitch as well as my singing pitch? Yes. Speak naturally into the microphone and the tool will display your current speaking F0 in real time. Note that speaking F0 varies continuously with intonation — it rises and falls with the natural prosody of speech. To get a representative speaking F0, try reading a sentence aloud at your natural pace and observe the range of values displayed, or sustain a neutral vowel at what feels like your natural speaking pitch.
Does the tool work on mobile? The tool functions on most modern mobile browsers. Chrome on Android generally works well. Safari on iOS requires a user gesture to unlock the AudioContext and may apply additional audio processing that affects accuracy. For the most reliable results, desktop or laptop use is recommended. Mobile results should be treated as indicative rather than precise.
Understanding Your Result
What is a normal voice frequency? Normal varies significantly by voice type and individual biology. As a general reference: adult male speaking voices typically range from 85–180 Hz; adult female speaking voices typically range from 165–255 Hz. Children’s voices are higher — typically 250–400 Hz. These are population reference ranges drawn from acoustic phonetics research. Individual variation within and outside these ranges is entirely normal and does not indicate a problem.
My reading shows 220 Hz. What does that mean? 220 Hz corresponds to A3 in standard musical tuning (A4 = 440 Hz). For an adult female voice, 220 Hz is within the typical speaking F0 range and suggests a mid-range speaking pitch. For an adult male voice, 220 Hz is at the upper end of the typical range, suggesting a relatively higher-pitched speaking voice or active singing. Context — whether you are speaking or singing, and at what effort level — matters for interpreting any specific reading.
Why does my frequency reading jump around? Speaking F0 varies naturally with intonation, stress, and vocal effort. Even on a sustained vowel, small variations of 5–15 Hz between analysis frames are normal. If the display is jumping by 50 Hz or more between frames, this suggests background noise interference, an inconsistent microphone signal, or very breathy phonation. Try sustaining the vowel more steadily in a quieter environment.
My result seems much lower than I expected. Why? Several factors can cause a lower-than-expected reading. Consumer microphones — including built-in laptop microphones — roll off in frequency response below approximately 100–150 Hz, which can cause the tool to underdetect F0 for very low male voices. Additionally, if OS noise suppression is active, it may attenuate the lower harmonics of your voice, shifting the apparent F0. A third possibility is that the tool is detecting a harmonic rather than the true fundamental — in this case, the displayed frequency will be a whole-number multiple of your actual F0 (for example, 200 Hz when your true F0 is 100 Hz).
What is the difference between fundamental frequency and pitch? Fundamental frequency is a physical, measurable property of a sound signal — the rate of vocal fold vibration in Hz. Pitch is a perceptual phenomenon — the subjective experience of how high or low a sound sounds to a listener. They are closely related but not identical. A voice with a fundamental of 130 Hz can sound higher-pitched than expected if its upper harmonics are prominent. A voice with a fundamental of 200 Hz can sound lower-pitched than expected if the vocal quality is dark and resonant. This tool measures F0. It does not measure perceived pitch.
Accuracy and Limitations
How accurate is the frequency reading? Under typical conditions — a quiet environment, a sustained vowel, and a functional consumer microphone — the tool achieves F0 detection accuracy of approximately ±2–5 Hz across the typical voice frequency range of 80–500 Hz. Accuracy is lower in noisy environments, with very breathy phonation, or for voices with F0 below approximately 100 Hz where consumer microphone low-frequency response limitations apply.
Can the tool tell me my voice type — soprano, tenor, baritone, and so on? No. Voice type classification depends on your full singing range, the location of your register transition points (passaggi), your vocal timbre, and acoustic qualities that a real-time frequency display cannot capture. The tool can show you your current F0 and give you a reference against typical range values for different voice types, but it cannot classify your voice type. Voice type assessment should be done with a qualified singing teacher or vocal coach.
Can this tool diagnose voice problems? No. This tool is not a clinical instrument and must not be used as one. Certain voice conditions — dysphonia, vocal fold lesions, vocal fold paralysis — affect the periodicity and stability of the voice signal in ways that this tool cannot reliably detect or differentiate from normal variation. If you have concerns about your voice or vocal health, consult a qualified laryngologist or speech-language pathologist.
Why does my result differ between Chrome, Firefox, and Safari? Each browser implements the Web Audio API differently. Chrome and Edge typically apply different default audio processing to the microphone stream than Firefox. Safari on macOS has direct access to Core Audio and may produce different frequency response characteristics. These differences can cause small variations in displayed F0 — typically 2–8 Hz — between browsers on the same hardware. The differences are real browser-level variations, not errors in the tool.
Does background noise affect the reading? Yes. Ambient noise with energy in the voice frequency range — traffic, HVAC, other voices, music — degrades autocorrelation peak clarity and can cause the tool to display incorrect or unstable F0 values. Testing in a quiet room with the microphone close to your mouth gives the most accurate results. If consistent background noise is unavoidable, see the Troubleshooting page for guidance.
Voice Science Questions
What is a formant and does this tool measure it? Formants are the resonant frequencies of the vocal tract — the peaks in the vocal spectrum produced by the shape and size of the mouth, pharynx, and nasal cavity. They shape the timbre and vowel quality of your voice and sit above the fundamental frequency. F1 and F2 (the first and second formants) are particularly important in vowel identification. This tool measures fundamental frequency (F0) only. Formant analysis requires separate spectral envelope processing and is not part of the current tool pipeline.
Does singing training change your fundamental frequency? Singing training does not fundamentally alter your habitual speaking F0, which is largely determined by vocal fold mass and anatomy. However, training affects your ability to produce frequencies across a wider range with consistent quality, changes the strength and balance of harmonics, and can affect your habitual speaking pitch through increased body and breath awareness. What you are born with as a physical instrument changes slowly and within limits; what training develops is control, efficiency, and range.
Why does my voice sound different on a recording than it does in my head? When you speak, you hear your voice both through the air (as sound waves reaching your ears) and through bone conduction — vibrations transmitted directly through the skull to the cochlea. Bone conduction emphasises lower frequencies, making your voice sound fuller and deeper to yourself than it sounds to others. A recording captures only the air-transmitted signal — which is what the Voice Frequency Test measures — so it typically sounds higher and thinner than your self-perception. The Hz reading this tool produces matches the frequency others hear, not the frequency you perceive internally.
About This Website
Who runs VoiceFrequencyTest.com? VoiceFrequencyTest.com is built and maintained by Amelia Foster, acoustic phonetics researcher and voice analysis educator. Amelia writes all content on the site personally. There are no guest contributors, no sponsored content, and no advertisers. For Amelia’s full background and the reasons this site was built, see the Author page.
Is this site free to use? Yes. The Voice Frequency Test and all educational content on VoiceFrequencyTest.com are completely free. No registration, no account, and no payment of any kind is required.
How do I report an error or ask a technical question? Use the contact page at contact@voicefrequencytest.com with the subject line “Content Correction” for factual errors or “Technical Question” for measurement questions. Amelia reviews all submissions personally. Response time: 48–72 hours.
Written by Amelia Foster, founder of VoiceFrequencyTest.com. Last updated: June 2026.