# Amplitude rise

A condition in which the amplitude at a specified location is greater than the amplitude at a reference location, both amplitudes being measured on the same surface and in the same direction. An entire surface (e.g., the face) is said to have amplitude rise if the amplitude everywhere is greater than the amplitude at the reference location.

Bar horns with only one slot typically have amplitude rise on their faces (for the axial amplitude, measured with respect to the amplitude at the center of the face).

Also see —
Amplitude droop
Uniformity.