Final answer:
The trumpet is the aerophone that requires a 'buzz' with the performer's lips to create sound. Buzzing is a technique specific to brass instruments.
Step-by-step explanation:
An aerophone that requires the performer to 'buzz' his/her lips to play is the trumpet. This buzzing action creates vibrations that travel through the air inside the instrument, which then produces sound. Unlike the flute or clarinet which require air to be directed over or through a reed, the technique of buzzing is crucial for instruments in the brass family, such as the trumpet, to generate sound.
When the performer blows air into the trumpet, their buzzing lips create vibrations that produce sound. By pressing different valves and adjusting their lip tension, the performer can change the pitch of the notes they play.