Tone Generator
Increasing the rate of alternation from 5 or 10 times per second to a faster rate will cause the back and forth movement of the linear motor to be perceived as sound.
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Times per Second
Electronic Alternator
Connect the audio output of the computer to an amplifier. Connect the output of the amplifier to a linear motor.
Adjust the rate of alternation to 400 times per second. Then click the “On / Off” button to turn on the electronic alternator. The linear motor should move back and forth 400 times per second. Can you hear the tone generated by this motiion?