(2) Trumpet horns

• Trumpet horns use the resonance of a trumpet to amplify sound.
• Because there is no need for the armature and core to collide as in a flat horn, trumpet horns have a wide air gap. The repeated vibrations of the diaphragm are converted to sound in the air chamber, and these sounds amplify as they resonate along the length of the trumpet.
• In contrast to the sharp peak frequency characteristic of flat horns, trumpet horns have wide and gradual frequency components, resulting in a soft-timbered sound