Question

Which of the following relations between loudness and intensity is correct?

(a) I ∝ log L

(b) I ∝ log L^2

(c) L ∝ log I

(d) L ∝ log I^2

Answer 1

Correct option is (c) L ∝ log I

The explanation is: Loudness is related to intensity by the relation L ∝ log I where L is the loudness and I is the intensity of sound. The loudness of a sound is the degree of sensation which depends on the intensity of sound and the sensitivity of eardrums while intensity is purely a physical quantity.