How are vibrations produced on trombone?

Vibrations on a Trombone are produced when the player buzzes their lips into the mouthpiece, creating a sound wave. The air column inside the instrument then vibrates in response to this lip vibration. The trombone's slide adjusts the length of the air column, allowing the player to change pitches while maintaining the same fundamental buzzing technique. This combination of lip vibration and air column manipulation produces the characteristic sound of the trombone.