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The voice change is the result of structural changes in the larynx (voice box) under the influence of the male hormone testosterone. Voice change in the average boy begins in early puberty when a boy's testicles begin to enlarge and produce testosterone. The specific age this takes place will depend on when puberty begins, and puberty may begin any time between ages 10 years to 14 years. There is then a gradual change or deepening of voice throughout puberty. The average age for completion of voice change is between 14 and 16 years, but just as there is a significant variation in the timing of puberty so is there in voice change.

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14y ago

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