Standing Waves in a String - Electrically Driven Tuning Fork

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 Code Number :   3B22.12

Disclaimer:

Reprinted by permission of Dick Berg, University of Maryland, for use on this website.

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Condition :   Good   
Principle :   Melde's Experiment  
Area of Study :  Acoustics  
Equipment :   Electrically driven tuning fork with an attached string, 0 to 20 VDC power supply, pulley/string tension device.

Procedure :   Set the device up much the same way as the other Melde's device (3B22.11).  Turn on the power supply to about 8 volts and adjust the point screw for a fairly large amplitude.  Adjust the tension device on the other end of the string until the desired number of standing waves in obtained.  NOTE:  too much tension on the string will stop the tuning fork.
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   References

Michael Liebl, "Saw Blades and Resonance", TPT, Vol. 43, # 3, May 2005, p. 282 - 284.

D. Rae Carpenter Jr.  "Letters: Impedance Matching with Speakers."  TPT, Vol. 30, # 9, p. 516, (December 1992). 

John G. McCaslin, "Melde's Experiment Apparatus", TPT, Vol. 18, #1, Jan 1980, p. 69.

 

Sa-10:  Freier and Anderson,  A Demonstration Handbook for Physics.

 

W-270:  "Audio Oscillator Drives Wire,"  DICK and RAE Physics Demo Notebook.



Mail Questions and Comments to:  Dale Stille