Introduction 

All of you are familiar with the term ‘sound’, right?

You must have heard the chirping of birds, the rustling of leaves, the blaring of horn, the melodious sounds of the flute or any musical instrument i.e guitar, harmonium, tabla, dhol, the whistle of train, the bell of a bicycle, the alarm clock, etc. We perceive all such sounds through our auditory sense or the sense of hearing, with the help of the organ – the ear.

Let us explore and understand the sounds that we hear. What is sound? How is it produced? How does it travel?