What is one way to increase the fundamental frequency of the voice?

Increasing the fundamental frequency of the voice involves altering the way the vocal folds vibrate. One effective method to achieve this is by tensing the vocal folds. When the vocal folds are tensed, they become thinner and stiffer, which leads to a higher pitch. This is due to the physical properties of the vocal folds; increased tension allows them to vibrate more rapidly, producing a higher frequency sound.

In contrast, relaxing the vocal folds decreases tension, which can lower the pitch. Decreasing subglottal pressure means that there is less air pressure below the vocal folds, which does not support higher frequency production and could also contribute to a lower pitch. Reducing breath support affects the amount of air pushed through the vocal folds, resulting in less loudness and possibly a decreased ability to maintain higher pitches. Therefore, tensing the vocal folds is the most direct way to increase fundamental frequency.