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Film summary
Sounds can vary greatly: extremely quiet or deafeningly loud, high and shrill to low and booming. Why are they so different?Key facts
- Sound is a vibration passed to and fro along particles forming a wave.
- It can only travel through matter and does not exist in a vacuum.
- Pitch is determined by the frequency of the wave.
- We hear sounds when vibrations travel into our ears.
Transcript
Sounds are produced when something vibrates.
It could be a vibrating string, a vibrating voice box or a vibrating drum.
Any vibration will transfer energy to the surrounding particles, which in turn pass the vibrations along, creating a sound wave.
The particles vibrate back and forth as the wave's energy passes, but they don't …
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