3B22.10 • Standing Waves : Melde’s String Vibrator

Location: Floor Demo

Photo shows demonstration used at the University of Texas at Austin

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Instructions / Notes:

• A thin bungy cord is driven under tension to show a variety of standing waves.
• A digital frequency generator with a built-in amplifier drives a speaker coil, which vibrates the string.
• The control knob ranges from 15hz to 80 hz to produce 1,2,3 and 4 nodal points.
• An optional strobe light can be used to freeze perceived motion of the string.

Last updated on March 31, 2025