How can we haer?

1. Sounds usually will be transmitted by air into the ear canal(outer ear), causing
the eardrum in the middle ear to vibrate.The message is then transmitted into
the inner ear.
2. After that the nerve inside the inner ear will transmit the vibrated message
into the brain.

耳朵的不同部份如何配合，令我們可聽到聲音。
請參考下面網址....佢應該幫到你..
http://www.epd.gov.hk/epd/noise_education/web/CHI_EPD_HTML/m1/intro_2.html