Actually it doesn't. The website you linked is talking about hormones the body generates, not testosterone that is injected. The same underlying factors that cause hormonal changes in the body also affect the voice. The testosterone itself doesn't make the change. Besides, it's glaringly obvious that the voice changes some troons make is completely artificial and contrived.
It includes testosterone. Testosterone changes cord width and tightness.
Those changes occur during natural maturation such as puberty, but any perceived effect by artificial testosterone supplementation is completely placebo.
Just do some searches. You can easily confirm it. It's one of the primary drivers. Including the development of the Adam's Apple in males.
Sheesh. Some people just love to argue.
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