Tuning Fork Waveforms, 3D46.16

Topic and Concept:

• Instruments, [:Instruments#TuningFork: 3D46. Tuning Forks]

Location:

• Cabinet: Waves and Sound (WS)

• Bay: A1

• Shelf: #1

attachment:TuningForkOscilliscope18-400.jpg

Abstract:

Use a microphone and an oscilloscope to display the waveforms of tuning forks of varying frequencies.

Important Setup Notes:

• There are three different mics that can be used for this demonstration (see photos below). You need only pick one.

Setup and Procedure:

1. Connect the mic to the pre-amplifier with a the appropriate cable.
2. Connect the pre-amplifier to the oscilloscope input with a coaxial cable.
3. Plug in the oscilloscope and the pre-amplifier. Switch these on.
4. Place the tuning fork nearby and strike with a mallet.
5. Position the mic near the vibrating tuning fork so that the signal is displayed clearly on the oscilloscope. The display range may need to be adjusted.
6. Try displaying the signal for other frequencies (other tuning forks).

Cautions, Warnings, or Safety Concerns:

• N/A

Discussion:

Discuss the physics behind the demonstration, explaining some of the various steps of the demonstration when appropriate.

Videos:

• [https://www.youtube.com/user/LectureDemostrations/videos?view=1 Lecture Demonstration's Youtube Channel]

References:

• List any references

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