Question

explain the process of working of human ear?

Answer 1

http://www.betterhearing.org/hearingpedia/how-we-hear
How We Hear | The Process of Hearing & How the Ear Works

Answer 2

The sounds which we hear are based on sound waves. These are longitudinal waves of molecules which result from regularly repeating changes in air pressure. The frequency and length of the vibrations are called frequency. (Vibration per second = 1 Hertz). With increasing frequency, the pitch of the sound gets higher. Short waves, i.e. higher frequencies, are perceived as high-pitches sounds. Long waves, i.e. lower frequencies, are perceived as low-pitched sounds. 
The outer ear, middle ear and cochlea of the inner ear constitute the organ for perceiving sound.  

The outer ear includes the auricle (concha auriculae) .