ACOUSTIC PRESSURE DISTRIBUTIONS AND ENERGY REFLECTIONS IN A FLUID-FILLED CYLINDER

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Abstract
From consideration of the expression for the acoustic velocity potential in a semi-infinite liquid cylinder, it is shown that the acoustic energy density is a maximum along the axis of the cylinder and a minimum along the wall.The amount of energy returned from a disk reflector whose center is located along the pipe axis is shown to depend, for small reflectors, primarily upon the disk diameter, and for large reflectors upon the energy distribution in the cylinder. Experimental results bear out the theory.

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