When your voice is 'forward', this should make the lips vibrate and cause a tingling sensation.

The higher resonances of the new series help the lips vibrate at the fundamental frequency and allow the pitch to sound.

A third method, known as 'split tones' or double buzz, produces multiphonics when a player makes his/her lips vibrate at different speeds against each other.

In brass instruments, the player's lips vibrate, causing the air within the instrument to vibrate.

Her lips were vibrating slightly and he wondered if she were already putting Wansor's stars to music.

Her lips were vibrating, but she couldn't claim it was painful.

During normal play, the upper and lower lips will vibrate together at the same speed.

Her lips were vibrating.

Woon's lips vibrated with a slight humming sound.

Liz kissed his cheek, and he could tell she was trying not to giggle by the way her lips were vibrating.