Question

please tell easy and best answer for this question

Answer 1

loudness;

It is subjective quantity. This means that a sound may be loud for one person and may be faint for another person.

It cannot be measured as it is just sensation that can be only felt.

Loudness depends upon sensitivity of one's ears.

intensity;

It is objective physical quantity. It means that it doesn't vary person to person.

It can be measures as a physical quantity.

It doesn't depend upon sensitivity of one's ears.

Answer 2

Loudness is related to the amplitude of sound waves (or pressure amplitude/ displacement relative to atmospheric pressure, typically), whereas intensity is the rate at which power (rate of energy transfer, or work per unit time) is transferred across a given area