Thursday, June 19, 2008

Sound by 2E2 Shayidah

I have learnt that Sound is a vibration.
When something makes a noise it is vibrating,and this causes air molecules around it to vibrate too.
These vibrations are transmitted through the air, to our ears, where we preceive them as sound.

Do you know that Thunder is one of nature's loudest sounds!
A nearby thunderclap may reach 120 decibals,equiralent to being within 60 metres of a jet aircraft during take-off.
Volcano eruptions may be the loudest commonly occuring Sounds on Earth,at over 272 dB.

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