How does subglottal pressure affect vocal performance?

Subglottal pressure is the pressure generated beneath the vocal folds and plays a crucial role in voice production. It significantly influences the loudness of the sound produced. When subglottal pressure increases, there is greater airflow and more force driving the vibration of the vocal folds. This results in a louder voice.

In singing and speaking, performers manipulate subglottal pressure to achieve varying loudness levels. By increasing this pressure, they are able to project their voice more effectively, making it a key factor in vocal performance. Hence, when the correct response states that subglottal pressure increases loudness, it is highlighting this fundamental aspect of vocal physiology and its direct impact on how sound is produced and perceived.