3D30.60 - Kundt's Tube


Kundt's Tube Demo.
Kundt's Tube Demo.



Code: 3D30.60


Demo Title: Kundt's Tube


Subject: Resonance Cavities


Description:
At one end of the tube is a loudspeaker attached to a signal generator producing a sine wave. The other end of the tube is blocked by a movable piston which can be used to adjust the length of the tube. The sound generator is turned on and the piston is adjusted until the sound from the tube suddenly gets much louder. This indicates that the tube is at resonance.


Procedure:

  • Explain the Kundt's tube to audience.
  • Turn on the function generator, sound will start from tube.
  • Use wave diagram to show the size of the sound wave in the tube.
  • Pull speaker down to the orange line and sound will stop because the wave is interrupted.
  • Pull the speaker to the next blue line and show how two wave lengths are present.
  • Repeat the process to demonstrate how the waves build up within the tube.

  • Video URL:


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