HOW IS IT POSSIBLE THAT SOUND CANNOT BE CREATED NOR DESTROYED. WHEN WE CLAP SOUND IS CREATED AND WHEN THE VIBRATIONS ARE STOPPED THE SOUND IS DESTROYED. HOW????
Sound is a compressional wave , i.e , pressure. And pressure is defined as Force per unit area or you may write
Thus when A increases the pressure decreases. Now sound waves looks like a circle where its center is the origin of the sound and the circle gets bigger as we go further from its center this means that the area covered increases and the sound compressional waves ( pressure) decreases.
Hence, on clapping the sound origin is at the centre (i.e. highest) and after some time the sound will destroy as the vibrations will start moving away from this centre.