A 2 in diameter pvc tube 1m long is open at both ends. Place a speaker driven by a function generator at one end. Find the resonant frequency for both ends open. Place a small microphone on a stick marked in cm inside the tube and observe sound pressure as a function of position with an oscilloscope. Then place a small plastic plate on the end opposite the speaker. Find the new fundamental frequency and repeat finding pressure as a function of position. Repeat for harmonics, both with open and closed end.

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