Human Ear Structure.png

 

How are we able to hear?

We are able to hear because our body has an extremely sensitive device called ear

 

How does ear function?

Ear has 3 parts-outer Ear, Middle Ear and Inner Ear

Outer ear receives sound vibrations

Middle ear amplifies these sound vibrations

The inner ear converts sound into electric signals

These electric signals are sent to brain

Brain interprets these signals as sound

 

What are different parts of ear and their functions

 

Outer ear

It is called pinna

It collects sound from different surroundings

 

Auditory Canal (Ear Canal)

It transports collected sound of Outer ear to Ear drum

 

Eardrum

It is a thin membrane (skin)

It collects compressions and rarefactions of sound

Compressions make eardrum move inward

Rarefactions make eardrum move outward

 

Ear bones

There are 3 ear bones - Hammer, Anvil and Stirrup

They amplify sound vibrations (increase its volume)

They also transmit sound to inner ear

 

Inner ear (Cochlea)

The cochlea is part of inner ear

It converts sound vibrations into electrical signals

 

Auditory Nerve

They transport electric signals to brain

Brain interprets these signals as sound

 

Questions

NCERT Question 22 - Explain how the human ear works.

View Answer

  1. Class 9
  2. Chapter 12 Class 9 - Sound

About the Author

Davneet Singh's photo - Teacher, Computer Engineer, Marketer
Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.