Are deep voices related to/caused by high testosterone?
In: Biology
No. There have been several studies trying to see if circulating total/free testosterone levels are correlated with lower voices with men, and no correlation has been found that reaches the level of statistical significance.
Similar to penis size and other physical characteristics that guys tend to obsess about, as long as you have sufficient testosterone to trigger and fully complete puberty, your voice will eventually drop to its lowest target level as defined by your genetics.
Vocal depth is more related to the size of the person, the size and laxity of their vocal chords and muscles, etc. If you don’t have sufficient testosterone to trigger puberty at all, then you’ll obviously never deepen to your genetic limit either, but that’s a different question.
(Edit: note this is also separate from the theory that some genetic male adult sexual characteristics are “primed” by levels of exposure to testosterone from the mother in the womb, for which there is slightly more evidence, but not the question as asked.)
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