Distinguish between loudness and intensity of sound.

Loudness	Intensity
Loudness is the measure of sensitivity of the ear to sound which can differentiate between loud and soft sound.	The amount of sound energy passing through a unit area in one second is called the intensity of sound.
Loudness may be different for different observers that depends on the sensitivity of the ears.	It does not depend on the sensitivity of the ears.
It’s unit is decibel (dB).	Its unit is watt/m2.

Chapter 11