Lips closed = semi-occlusion. All voiced air routes through the nasal cavity and exits the nose. Back-pressure builds behind the closed lips, cushioning the vocal folds. The 'mmm' resonates through your facial bones.
What you should feel
👃Buzz on the bridge of your nose (place a finger to check)
😊Vibration spreading into cheeks and forehead
👄Lips gently closed — not pressed tight, teeth apart inside
🫁Slight fullness in your throat (the back-pressure)
Tap to explore
Sit or stand comfortably with your lips gently closed and teeth slightly apart inside your mouth.
Audio Guide
Listen to the guided walkthrough before you begin.