Class 4Environmental StudiesEar to Ear

How We Hear

Sound is a vibration that travels through air to our ears. The ear has: Outer ear (pinna) — collects sound, like a funnel. Ear canal — channels sound inward. Eardrum — vibrates when sound hits it. Ossicles (3 tiny bones: malleus, incus, stapes) — amplify vibrations. Cochlea (snail-shaped) — converts vibrations to nerve signals. Auditory nerve — sends signals to brain, which interprets them as sound.

How to study this topic

Read the core explanation once without solving.
Open the formula links below and connect them with the topic meaning.
Practice the 10 example pages one by one.
Use the AI ask page for text, voice or image-based doubts.

10 example pages

Concept check 1

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Definition to application 2

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Formula warm-up 3

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Reasoning practice 4

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Board-style short answer 5

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Mistake correction 6

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Visual interpretation 7

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Applied word problem 8

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Revision challenge 9

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Exam recap 10

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