When speaking, only the first third of Joe's vocal folds vibrate, but when John speaks, half of the length of his vocal folds vibrates. Who has a higher-pitched voice?
A) Joe
B) John

Question

Quizplus · Accepted Answer

When speaking, the shorter the length of the vibrating vocal folds, the higher the pitch of the voice. Since only the first third of Joe's vocal folds vibrate, his vocal folds are shorter than half of John's vocal folds that vibrate when he speaks. Therefore, Joe has a higher-pitched voice than John.

When Speaking, Only the First Third of Joe's Vocal Folds