A Sound Education: Good Vibrations
A tuning fork is a simple way to illustrate that sound is vibration. When struck, the tines of a tuning fork vibrates, making a sound.
If a tuning fork’s stem is tapped against a hard surface, its tines stay straight, but move towards, then away from each other in mirrored movements.
You may not see it, but the stem also moves—but the movements are up and down. This vibration can be felt if, after the fork is struck, its stem is placed on a hard surface.
See the Notes section in the slide for information on purchasing tuning forks.
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