The bar horn is designed to increase uniformity of the displacement on the output face through
simulation and experiments. Three-dimensional modal analysis is conducted using the finite element method
to calculate the vibration mode and displacement on the output face, and the design of experiment (DOE)
technique is employed to determine the optimum dimensions of the groove and slot so that the high
amplitude uniformity of the bar horn is produced. Displacement of the bar horn was measured using the
Laser Doppler Vibrometer (LDV), and the experimental results show good agreements with the predicted
results. High uniformity of the bar horn is achieved with the dimensions of the groove and slot determined
using the design equations.