Question

What is the SI unit of intensity of sound?

Answer 1

Sound intensity :

1. The power is carried by sound waves per unit area in a direction perpendicular to that area is defined as sound
2. Sound intensity is a vector quantity.
3. The sound intensity depends on the surface of the sound source.
4. The intensity of sound also depends on the distance from the sound source, and the elasticity of the medium between the source of a sound and the receiver.
5. The mathematical expression for sound intensity is $\mathrm{I}=\frac{\mathrm{P}}{\mathrm{A}}$, where $\mathrm{I}$= sound intensity, $\mathrm{P}$= sound power, $\mathrm{A}=$area.

An illustrative diagram of sound intensity :

SI unit :

1. Decibel is the SI unit of sound intensity.
2. The dimension of sound intensity is $\left[{\mathrm{M}}^1{\mathrm{L}}^2{\mathrm{T}}^{-3}\right]$