open and closed tubes
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.
|Large pipe on a frame with connections set in box
|Above 021-17 and 021-18
Unfortunately, there are no media for this demo. :(