VocalMaxx · Guides
Voice pitch results: median, speaking range and stability
Read one VocalMaxx recording’s vocal frequency median, P10–P90 range and semitone stability without treating them as health scores.
In this guide6
Keep the three measurements separate
VocalMaxx reports a median vocal frequency in Hz, a speaking-frequency range from P10 to P90 in Hz, and stability in semitones. They describe different aspects of the accepted recording. Read the labels and units before comparing the numbers. None is an instruction to lower your voice, a measure of confidence or a clinical assessment.
Voice pitch measurement: check the iPhone microphoneRead the median as a middle value
The app sorts the frequency estimates retained from voiced frames and takes their median. A hypothetical result of 140 Hz means a middle value of those retained estimates, not that every syllable was spoken at 140 Hz. Pauses and unvoiced sounds are not interchangeable with voiced pitch estimates. Keep the recording task and conditions beside the result.
Understand what P10 and P90 leave out
P10 and P90 are lower and upper percentile values in the retained frequency estimates. A hypothetical displayed interval of 110–190 Hz is not your absolute lowest and highest possible vocal frequency. Values outside that central interval can exist. It also does not establish your singing range: an ordinary speaking recording is a different task from exploring musical notes.
Interpret stability in its own unit
The stability calculation measures dispersion after converting vocal frequencies to a semitone scale. It is not another Hz reading, and it is not a recommended target. For example, a result labelled 1.2 semitones should not be compared numerically with a median labelled 140 Hz. Changes in phrasing and the recording can affect these descriptions without establishing better or worse vocal health.
Compare recordings without forcing a result
For a comparison, use a comfortable speaking task, similar placement and similar conditions. Inspect the median, interval and stability together rather than choosing whichever number looks favourable. NIDCD recommends avoiding extremes of vocal range and resting the voice when it is tired or hoarse. Do not force a lower pitch or hold an uncomfortable sound to move a statistic.
Sources for this section NIDCD: Taking Care of Your Voice
Recording your voice for practice: a simple setupUse the numbers for a limited observation
Write an observation such as “the median was lower in this recording” rather than “my voice is healthier.” An accepted recording is not a diagnosis or proof of a lasting change. If speaking causes pain or persistent difficulty, seek appropriate professional advice instead of using app statistics to rule out a problem.
Sources for this section NIDCD: Taking Care of Your Voice
Questions
Is the P10–P90 interval my full vocal range?
No. It describes percentile values from retained voiced frequency estimates in that recording, not every frequency you can produce or your singing range.
Does a lower stability number prove a healthier voice?
No. It describes frequency dispersion in the recording, not a clinical condition or a required target.
Further reading
Guides
How to measure and compare your voice pitch recordings
What hertz actually describes, why a single reading means little, how to keep two recordings comparable, and how to read a range without chasing a target number.
Voice practice without strain: a simple routine
How to warm up gently, record useful comparisons and stop before practice turns into a voice problem.