here is the ans_
LOUDNESS:- (1) Loudness is a measure of response of our earto the sound.
INTENSITY :- (1)It is the energy passing per second per unit area normalto the direction of energy flow
LOUDNESS:-(2) It depends on intensity as well as sensivity of theear. therefoe , it is not absolute but relative
INTENSITY :- (2) It does not depends on the sensivity of ear
LOUDNESS:- (3)the unit is - Decibel
INTENSITY :- the unit is -Watt / m²