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Experimental Setup:
 Remove the inner tube from the outer tube.
- Place the outer tube on two stands.
- Place the Open Speaker several centimeters from the edge of the outer tube. Angle it about 45 degrees as in the picture to the right.
- Use banana plugs to connect the Open Speaker to the Sine Wave Generator. Polarity does not matter.
- Plug in the Sine Wave Generator to an electrical socket. Turn it on.
- Turn the amplitude about midway and adjust the frequency to about 50 Hz.
DOWNLOADS for "Wave Speed":
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