Propagation of Sound Waves — Question 13

The speed of sound is more in humid air.

From the relation.

V ∝ $\sqrt\dfrac{\text {γP}}{\text ρ}$, it is clear that V ∝ $\dfrac{1}{\sqrt\text ρ}$ i.e., the speed of sound is inversely proportional to the square root of density of the gas.

As the density of air decreases with an increase in moisture level in air hence speed of sound increases in humid air.