Question

Distinguish between loudness and intensity of sound.

Answer 1

Hint: First let us see what loudness and intensity of sound means-
Loudness is that sensation of hearing where the sound ranges from quiet to loud.
Sound intensity is the sum of sound energy that travels into our ears per second.

Complete step by step answer:
Loudness is correlated with the sound wave amplitude (or pressure amplitude/displacement relative to ambient pressure), while intensity is the rate at which power (rate of energy transfer, or work per unit time) is transmitted over a given region (power/area, or energy transfer rate per unit area).
The unit of loudness is decibel whereas intensity of sound is measured in watt per meter square.
Loudness depends on the responsiveness of the human ears whereas intensity of sound is independent of any hearing sensitivity.
Loudness of sound may vary for different people but intensity of sound is the same for everyone.
Loudness of sound cannot be measured whereas intensity of sound can be measured.
Loudness of sound depends on amplitude whereas intensity of sound depends on energy.
The intensity of sound is specifically equivalent with the vibrating body whereas the loudness of sound is not.
The intensity of sound is a physical quantity whereas the loudness of sound is just a response perceived by the human ear.

Note:
In short we can say that loudness is equivalent to how intensity is depicted. When we increase the energy in the wave loudness increases. Intensity is equivalent to the amount of energy in the wave which increases the loudness. The intensity decreases as distance decreases.