Musical wind instrument, usually made of brass or other metal, in which the vibration of the player's lips against a cup-or funnel-shaped mouthpiece causes the initial vibration of an air column.
The trumpet , trombone , French horn , tuba , euphonium , sousaphone , cornet , flügelhorn , and bugle , as well as historical instruments such as the ophicleide, cornett, and serpent, are considered brass instruments (though the last two were made of wood); the saxophones, though made of brass, are reed instrument s classified as woodwind instrument s.