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\section{Apparatus and Procedure}  This lab used a function generator that was set to 5 Volts thats connected to the speaker that will be used to feed frequencies into the geometries. The function generator was set to sin functions. This was set to sweep from 500 Hz to 5 kHz over a time interval of 1-2 seconds. An amplifier connected to a power supply which then connected to a capacitance microphone. An increase in of $\delta p$ will put pressure an the microphone, then there will be a capacitance, and an oscillation in p will have an oscillation in the capacitance. The voltage will oscillate as well to keep $q=cv$ true. The amplifier was then outputed to an oscilloscope and a data acquisition device to take data. Measurements were made at three different parts for the rectangular geometry;in the top corner, the middle between the corner and the z=0, and in the middle of the box. Average values for the length of the rectangle were $L_x=0.2026$ meters ,$L_y=0.1613$ meters, $L_z=0.1404$ meters. The cylinder had avereage dimensions of r=0.01208 meters and L=0.04441 meters. Measurements made for the rectangular geometry were made at a temperature of $22\pm1 c$ and percent humidity of $53\% \pm 1\%$.Cylinder measurements were made at $T=23.4 celsious$ $T=23.4$ celsius$  and with $56\%$ humidity.