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We are surrounded by air molecules, jostling each other. Each time something moves, it exerts a push on that air around it and a compression wave travels out from that object. A continuous series of compressions is called a sound wave and the frequency of the compressions determines how it interacts with the world. The world around us is wobbling all the time but we can only detect vibrations of 20-20,000 Hz. However, this still lets us hear the shapes of things...
Links:
- In the Blink of an Eye with Helen Czerski. (2007-03-13)
- Everyday Science: The science in your lunch with Helen Czerski. (2006-09-08)
- Everyday Science: Wobbly World with Helen Czerski. (2006-09-08)
- Everyday Science: To have air or not to have air... with Helen Czerski. (2006-09-07)
- Everyday Science: Wonderful Water with Helen Czerski. (2006-09-06)
- Everyday Science: So hot you can see it! with Helen Czerski. (2006-09-06)
- Everyday Science: Bendy light with Helen Czerski. (2006-09-05)
- Everyday Science: Macho Materials with Helen Czerski. (2006-09-05)
- Everyday Science: Wobbles that you can hear with Helen Czerski. (2006-09-04)
- Everyday Science: Introducing Helen with Helen Czerski. (2006-09-04)
- Einstein - flying with photons with Helen Czerski. (2005-03-19)
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From the same publisher: BAFoS,
the same category: 2006,
the same type: demonstration,
the same subject: P Physics - General,
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