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📘 How hearing turns sound into signals

Trace the eardrum, ossicles, cochlear waves, hair cells, auditory nerves, and brain interpretation.

lessons

~10 min

to learn

🔬 Science

subject

Adults

level

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What you’ll learn

Outer ear
Eardrum
Ossicles
Cochlea
Pitch
Hair cells
Synapse
Intensity
Auditory nerve
Meaning

Questions this course answers

What does the eardrum do?

The eardrum vibrates in response to sound waves.

What is the role of the ossicles?

The three middle-ear bones transfer pressure to the oval window.

How does the cochlea represent pitch?

The membrane’s changing mechanics create a place map of frequency.

What opens channels in a hair cell?

Mechanical deflection opens ion channels at stereocilia tips.

Where is sound ultimately interpreted?

Auditory pathways carry coded activity to brain regions that recognize sound.

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