How We Hear (Sound)

Physics · Class 8–9 Follow a sound wave from the air into your ear and see how you hear it. syllab.in · free

How We Hear (Sound)

🧠 Remember it Sound's path: Pinna → Ear canal → Eardrum → 3 tiny bones → Cochlea → Auditory nerve → Brain. Vibrations become nerve signals: "the eardrum drums, the cochlea codes."

🌏 In real life Cup your hand behind your ear and distant sounds get louder — you have enlarged the pinna, the funnel that gathers sound waves into your ear.

📝 Quick notes Sound travels as vibrations (a wave) through a medium such as air. The pinna (outer ear) collects sound and funnels it down the ear canal. The eardrum vibrates when sound waves hit it. Three small bones (hammer, anvil, stirrup) amplify the vibrations and pass them on.

🎯 Test yourself What is the job of the eardrum? It vibrates when sound waves hit it and passes those vibrations to the ear bones.

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