Abstract
This report describes some of the transmission phenomena in slotted acoustic tubes. Only round cylindrical tubes with uniform slots are considered. A graph with a family of curves illustrates the behavior of the attenuation and phase constants as they vary with frequency and slot width. The slotted tube is a high-pass filter. When all of the variables (including slot width, wavelength, phase, and attenuation constants) are properly normalized with respect to the radius of the tube, two curves are found to be sufficient to describe the complete variation of the two constants. These phenomena are explained in terms of the analogous electrical-transmission line loaded with shunt resistance and inductance.
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