The woman let out her breath, as if exhaling a cigarette.
Remember to really put some effort into exhaling through your puckered lips.
The action of the muscles within the larynx, the diaphragm and the intercostal muscles creates air movement and pressure within the trachea during inhaling and exhaling.
Vocalizations are determined by physical structure as well as the action of the respiratory system muscles and the acts of inhaling or exhaling.
For example, cats meow when exhaling and will purr when both inhaling and exhaling, and this gives each vocalization its own unique sound.