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.