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.
