| Sound: a tiny
pressure wave |
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| • | Waves
of compression and expansion of the air |
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| – | (Imagine
a tuning fork, or a vibrating drum pushing the |
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| air
molecules to vibrate) |
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| • | Tiny
change in local air |
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| pressure: |
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| – | Threshold
(softest |
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| sounds):
1/1010 |
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| Atmospheric
pressure |
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| – | Loudest
sounds |
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| (bordering
pain): 1/1000 |
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| Atmospheric
pressure |
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| • | Mechanical
sensitivity |
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