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• 13:22, 14 April 2022 Physdemo talk contribs created page Hoot Tubes (Created page with "{{NewDemo|subject=OWS|topic=Sound|file1=Hoot_Tubes.gif}} A metal tube has a metal screen placed inside it a short distance from one end. Place the tube over a burner to heat up the screen and then remove the tube from the burner. With the tube in a vertical position the cooling screen sets up a sound vibration. The length of the tube picks out the resonating wave length. Turn the tube horizontally and the sound stops. The largest, ~5 ft. x 6 in., has been dubbed "The Vo...")