HOW EARS WORKS ?

It is possible to detect a distant train, which still can't be heard, approaching us by placing our ear very near to the railway line. How this works ?

Human Ear Structure || External Ear Middle Ear and Internal Ear

Ear drum is

Draw a neat and labelled diagram of the human ear. With the help of this diagram, explain the construction and working of the human ear.

What are the functions of ear ? How are these performed ?

How can infection in the ear affect equilibrium of the body ?

Why and how is the the force of vibrations increased in the middle ear ?

A and B the completed work and divided the earings in the ratio of 2:3 . What is the ratio of time taken to complete the work by A and B, respectively?