Keep it comfortable.

Your voice comes first.

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The technique · 1 of 5

Hiss before you sing

Breathe in low and hiss on "sss" for as long as is comfortable. Listen for surges or dips in the hiss. A smooth hiss means your air can run steadily; a pulsing one means the shake may start there.

Sing "ah" on a comfortable middle note at a medium-soft level for four to six seconds. Watch your jaw in a mirror. If it quivers, rest a fingertip on your chin as a reminder to keep it still.

Hold the note and move slowly through "ee", "eh", "ah", "oh" and "oo", letting each settle before the next. If the wobble shows up on one vowel more than the others, that vowel is where to spend your time.

Add a second or two to the held note each day, stopping before you run short of breath. The shake usually returns as the air runs out, so stopping early keeps the practice steady.

Once a note is steady, sing it again straight after jogging on the spot for twenty seconds, or while someone listens. That brings in a mild version of nerves, so the steadiness gets practised in the state where you need it.

Read at your pace. Singing is not required.

Why this exercise · 1 of 9

The idea behind it.

A shaky voice wobbles on held notes in a way you did not ask for. It is different from vibrato, the regular, even pulse many trained singers let happen on long notes. A shake is irregular: it speeds up and slows down, gets worse when you are nervous, or comes and goes with your breath.

Most of the time it comes from uneven airflow, a mouth shape that keeps shifting, or adrenaline. A tremor that also shows in your speaking voice, that has been getting steadily worse, or that comes with other changes in your body is something to see a doctor about.

Pitch is very sensitive to airflow. If the breath arrives in surges, which happens when the ribs drop quickly or the belly grips and lets go, the pitch follows the surges and you hear a wobble. Steady air under the note gives you a steady note.

The mouth can shake a note too. If the jaw, tongue or lips keep adjusting during a held vowel, the vowel drifts, and the pitch tends to drift with it. Singers often feel this as a quiver in the jaw on long notes.

Nerves add their own shake. Adrenaline speeds your breathing and tightens muscles, which is why a voice that is steady at home can wobble in front of people. The practice for that is the same steady-air and steady-vowel work, repeated until it holds up with your heart beating faster.

A shaky voice gets called weak vibrato or a lack of confidence, and the advice is to sing out or to believe in yourself. That rarely steadies a note, because the wobble has a physical source you can find.

A steady hiss and a steady vowel are both trainable, and they are what make a note sit still.

The free pitch test reports pitch stability as well as how close you land. Take it on a calm day for a baseline, then again after a couple of weeks of sustain practice to see whether your held notes have steadied.

Vocal School sessions pair breathing work with pure-vowel sustains, then move those vowels onto scales, so a steady held note carries into moving lines. Free tier: one full session a day.

Put it into practice.

A short version of the technique, with its own cues and pacing. Stay in a comfortable range.

What did you notice?

Does the shake start straight away, or only near the end of a breath? A shake that starts immediately often comes from the jaw or the vowel. One that arrives as the air runs out comes from the breath. One that is much worse in front of people than alone is mostly nerves, and the practice is the same, done more often.

An observation, not a diagnosis. No answer is required or scored.

Choose a snapshot.

Pitch matching and range are separate measurements. Neither identifies the physical cause of a vocal problem.

Both return to this guide. Stop and rest if your voice feels strained.

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Keep exploring.

• Long Tone ExerciseSustained notes expose support, steadiness, and onset all at once. How to practice long tones so they diagnose rather than just endure.
• The Vibrato ExerciseVibrato tends to show up once a sustained note is free, not when you shake it on purpose. An exercise for letting it appear, and how to hear what is holding it back.
• Stage FrightPerformance anxiety has specific vocal effects: shaking, dry mouth, shallow breath, sharp pitch. The mechanism for each, and what actually helps.

Explore gently

A practice cue, not a diagnosis or a finish line.