I've learnt something about sound from the sources i had taken and studied,such as borrow books at the library, looking at the science textbook and also searching information on the internet. What i've learnt? I've learnt that sound is a type of energy that were produced when an object vibrates.
Why do we hear sounds?
Humans have three parts, the outer ear, the middle ear and the inner ear.
What does the outer ear do? It collects and funnels the sound to the middle ear. Between the outer ear and the middles ear is a membrane called the eardrum.
What cause the eardrum vibrate?
Sound waves cause the eardrum to vibrate. When the eardrum vibrates, it touches the first of the three tiny bones in the middle ear. This bone vibrates and cause the other two bones to vibrate.
( source taken by book physical science in depth and http://www.worsleyschool.net/science/files/sound/energy.html )
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