Hornbostel - Sachs
Valve trumpets with short air column (less than 2 m)
Valve trumpets with long air column (more than 2 m)
Labrosones with valves
The air itself is the vibrator in the primary sense. The standing waves are significantly confined within the instrument itself. The air-stream passes through the player's vibrating lips, so gaining intermittent access to the air column which is to be made to vibrate. The tubular body has a bore profile that is predominantly cylindrical. The body can be lengthened or shortened by connecting or disconnecting auxiliary lengths of tube.
Valve trumpets