Question

What is the SI unit of intensity of sound?

Answer 1

1. The amount of sound energy passing per unit time through a unit area at a place is called the intensity of sound at that place.
2. If total sound energy E crosses normally on area A at a uniform rate in time t, then the intensity of sound is given as:
3. Intensity of sound (I) = E / At
4. Hence, the SI unit of intensity of sound is J/ m² s.