Standing Waves applet
This applet will help you understand the displacement and pressure graphs of sound waves in pipes. It shows a graph along with an animation of the air molecules in the pipe.
 To change the tube type, click on both sides open, one side open, or both sides closed.
 To change the graph type, click on displacement or pressure.
 To change the vibrational mode, click the Higher or Lower buttons.
You can choose from the fundamental up to the 5th overtone.
 To recalculate wavelength and frequency, enter a new value for Length of tube from 0.1 m to 10.0 m.
The values are calculated at 20 °C (speed of sound at 343.5 m/s) and neglecting influences of the tube's diameter.
Download
To download this applet, save pipewaves.html and
pipewaves.jar into the same folder.
Then, open pipewaves.html to use the applet.
References
Standing Longitudinal Waves
The original applet created by Walter Fendt.
My version adds graph animation and the option of graphing either displacement or pressure.
Robert Hart
Sept. 18, 2003
