: Increased heart rate and blood pressure often lead to heavier breathing. Moans are frequently the result of exhaling against a partially closed glottis (the opening between the vocal cords).
: High levels of physical tension (myotonia) during the plateau phase of arousal can cause vocalizations as muscles in the chest and throat contract. The "Copulatory Vocalization" Phenomenon Sexy Erotic Female Moan
Ultimately, female vocalization is a blend of and intentional communication . Whether it’s a low hum or a loud cry, the "solid feature" of the moan is its ability to bridge the gap between two people, turning a private physical sensation into a shared emotional and sensory experience. : Increased heart rate and blood pressure often