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| Ink on paper: The Ear |
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!
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| 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.
- Sound wave reach the tympanic membrane and cause it to vibrate
- 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
- 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.
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