How we hear Sound? Anatomy Inner workings of our ear.

Last Revised: Sunday, November 25, 2012


Ink on paper  Ear
Ink on paper: The Ear
Let's learn about how we hear..
Understand why? when a mechanical wave is created by a vibrating body (eg. musical instrument), is being heard as sound.

Sorry for my bad drawing lol. Both are done by me but you can see I didn't put in any effort for the diagram below haha!
The ear diagram
The ear diagram

This is just a simple structure of our ear (excluding the stick man of course).
From my drawing you can see the three labelled parts; tympanic membrane (aka eardrum), auditory ossicles and cochela
They each plays a different roles which contributes to our hearing.
  1. Sound wave reach the tympanic membrane and cause it to vibrate
  2. The vibration will be relayed through the ossicles,
    • the ossicles are like little levers, it is said that the force of the vibrations is being amplified about 20-fold
    • they are three the smallest bones found in our body
  3. Finally it reaches the cochlea
    • inside Cochlea is filled with fluid
    • when the fluid moves the hair cells in the cochlea will be stimulated 
    • which induces action potential signals in nerves cells
    • these signals will then be processed by our brain as sound!    
To summarise: Soundwave>Tympanic Membrane>Ossicles>Cochlea>Brain

So when you play an instrument, it will vibrate. This vibration will cause the molecules in the air to also resonate. Note that sound is a mechanical wave it only travels through a medium(this case is air). When the vibrating air molecules hit your ear you'll hear sound. 

Additional Information: Our ears also help us in maintaining balance.
Durian Opened by Simon Ooh

Currently viewed

Google+ Followers