Testosterone and Your Voice

By Nick Peplow·Gender-affirming surgery coordinator

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For most trans men and transmasculine people, testosterone does the heavy lifting on voice. It thickens the vocal folds, pitch drops over roughly the first year, and for many people that is enough that voice never becomes a project at all.

It is also one of the changes that matters most day to day. A voice that reads as male on the phone, in a shop or across a room takes away a whole category of misgendering. Knowing what to expect, what is normal along the way, and what to do if the voice stops short of where you want it makes the whole stretch far less unnerving.

I am not a doctor or a voice therapist. I have spent over a decade coordinating patients through hospitals in Bangkok, and voice comes up in more conversations with trans men planning chest surgery than you would expect, often as a worry they have not raised with anyone else. This is information, not medical advice. Your prescriber is the person to decide dose and pace with.

What testosterone does to the voice box

The voice box, or larynx, responds to testosterone in one direction only. Under testosterone the vocal folds gain mass, and heavier folds vibrate more slowly. Slower vibration is heard as a lower pitch.

In a teenager going through a testosterone puberty, the voice box also grows, and the folds get longer. On testosterone as an adult, the folds thicken, but the cartilage framework around them has mostly finished growing. Thicker but not much longer is the usual adult result. That is why most people get a real drop, and why some get less than they hoped for.

Testosterone does not change the shape of the throat and mouth above the voice box. That space gives a voice its resonance, the quality that makes one voice sound bright and another sound full. It stays as it was until you learn to use it differently.

How long it takes

Dose, age and individual response all move the timing. As a rough picture, the first changes show within the first few months, often as a voice that tires sooner, feels rough or catches. The noticeable drop usually comes over the following months, and most of it is in place by around the end of the first year. Some settling can go on into the second year.

A voice that has barely moved by the end of the first year may still move a little, but it is a good time to talk to your prescriber about levels and to think about training rather than just waiting.

The cracking phase

For a stretch in the middle, the voice is caught between the old and the new. It cracks, flips up without warning, goes hoarse, drops out on some notes and is hard to control when you are tired or trying to be loud. This is the folds changing faster than your control over them, and it is normal. It usually settles over weeks to a few months.

The temptation is to push the voice down to get past it. Forcing a low pitch is how people end up hoarse and strained, and it does not speed anything up. Speak at whatever pitch comes easily, drink water, and rest the voice when it is tired. Persistent hoarseness, pain or a voice that keeps getting worse rather than settling is a reason to see an ear, nose and throat specialist rather than wait it out.

A permanent change that varies from person to person

The deeper pitch stays if testosterone is stopped. If you are unsure how far you want to go, that is the fact to weigh before starting.

How far the voice drops varies a lot, and nobody can predict yours at the start. Most people end up with a voice they are happy with. Some want more. For some of them the remaining gap is pitch. For many it is resonance and speaking habit, and those respond well to training.

Testosterone also lowers the bottom of your range, but it does not move where you habitually speak. Plenty of people keep talking near the top of the new range out of habit, years after the folds could sit lower. The top end changes too. Notes you used to reach comfortably, including falsetto, often go or become unreliable.

Singers, low doses and non-binary people

Singers often notice the most. The range shifts down, the top of the old range goes, and control is patchy during the unstable months. Many singers rebuild a working voice in the new range, and some prefer it once it settles, but a period of relearning is usual. Find a singing teacher who has worked with voices on testosterone before the voice starts to move.

Low doses are often chosen by non-binary people and people who want slower or partial change. Lower doses usually mean slower change, but the voice can drop even at modest doses, and you cannot reliably keep the other effects while ruling out the voice. Because the change is permanent, talk it through with your prescriber before starting. The testosterone requirements guide covers how testosterone fits with surgery more broadly.

Going further than testosterone

If the pitch has settled and you want more, the first step is almost always voice training, ideally with a speech and language therapist who works with trans voices. Resonance, a lower speaking habit and the weight of the voice make a real difference, and many people who thought they had a pitch problem find they had a resonance one. I would give training a fair run before thinking about anything else.

For people whose pitch is still higher than they want after a good run of testosterone and training, there is surgery. Relaxation thyroplasty slackens the vocal folds to lower pitch. It is a specialist operation that builds on testosterone and training rather than replacing them.