A method for comparing related nozzle designs possessing widths proportional to their frequencies over a broad frequency range is presented and utilized on asymmetric multiple Fourier nozzle designs. The underlying causes of the frequency dependent performance of the nozzle designs are explored and compared. Based on this knowledge, a better understanding of the operation of the nozzles is obtained. From this understanding, nozzle designs intended to operate at higher frequencies can be built in a more effective manner.