Complex sentence: Normally, adolescent males undergo voice changes due to a sudden increase in the length and thickness of the vocal folds often noticed as the sudden enlargement of the larynx (aka "Adam's Apple" when viewed as a protrusion at the anterior of the neck).
Split into simpler sentences: Normally, adolescent males undergo voice changes 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).