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Puberphonia
Puberphonia (also known as mutational falsetto) is the habitual use of high-pitched voice beyond puberty. ==Introduction==
Typically, adolescent males undergo voice changes to a much lower pitch due to a sudden increase in the length and thickness of the vocal folds. Often this size change is noticed as the sudden enlargement of the larynx (aka "Adam's Apple" when viewed as a protrusion at the anterior of the neck). This is uncommon in females because their vocal folds do not show a sudden increase in size.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Puberphonia」の詳細全文を読む
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