Human ear - structure & working | Sound | Physics | Khan Academy

Let's explore how human ears work.
More free lessons & practice on this chapter-www.khanacademy.org/science/i...
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Created by Mahesh Shenoy

[@KhanAcademyIndiaEnglish]

Hey, here's a dedicated CBSE course on our website where you can practice all the concepts related to this video and more. And oh, it's always free. www.khanacademy.org/science/in-in-class9th-physics-india/in-in-sound-india

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How our ears works? 😳 First there is a outer part pinna which we can touch it is used to collect all the sound waves and send it to the auditory canal which is used as a channel 💕...Next part is ear drum which is a transparent layer. It vibrates from a very small motion. it also separates inner ear from external ear.🧁 Then the middle part of ear comes. In this part there are three tiny bones which are called ossicles. Which vibrates and transfers sound waves to inner ear . It also amplify the sound. Amplification is needed because There is liquid in inner part and it needs to be vibrated at a high pressure. Ossicles can increase 20x in pressure. The three bones of ossicles are: First bone: Malleus 😶 Second bone: Incus 🧁 Third bone: Stapes 😜 Next is the inner part of the ear.... Here are semicircles three rings. This helps body to balance. 🤗 A snail shape structure called cochlea. The fluid vibrates in it. Cochlea has special cells which converts sound waves to electrical signals. Unless Sound waves are not converted to electrical signals. They don't reach our brain and we are not able to hear Sound. Then these electrical signals reaches are auditory nerve which helps sound waves to reach the brain and we are able to hear 😁. Because of Cochlea cells We can hear different sounds. They are sensitive for loudness and frequency and we can also tell when a sound is loud or soft and its frequency is high or low.This is how our ears work 😉

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Wow well explained..because I went for a surgery this day..my eardrum has a hole and my hearing was decreased it will depend how volume the voice is so they because there's a discharge coming out so they cover it..but my inner ear they can't repair for it.. Any recommendation from you sir..

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