Waves Vibrations and Oscillations
Sound Waves

How can a microphone and oscilloscope show a sound wave?

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Wiki User
June 05, 2011 6:37PM

The microphone reacts to changes in air pressure and creates corresponding AC electical waveforms.

The oscilloscope takes the AC waveforms and deflects a moving electron beam in a cathode ray tube, thus producing a moving display of the electrical waveform.