Question

What is sound Intensity?

Answer 1

Definition

Sound intensity however is defined as the proportion of energy that flows per unit time across a unit area perpendicular to the direction of travel of such sound waves.

1. Sound intensity is denoted by “I”.
2. The SI unit of sound intensity is $\mathrm{W}/{\mathrm{m}}^2$.
3. Formula: $\mathrm{I}=\frac{\mathrm{P}}{\mathrm{A}}$. Here, P is the power, and A is the area.
4. The smallest detectable sound intensity is $1\times {10}^{-12}\mathrm{W}/{\mathrm{m}}^2$