Define intensity of sound. State its unit. - Vidyadip

Question

Define intensity of sound. State its unit.

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Answer

Definition: The intensity of sound at a point is the time rate of flow of sound energy passing normally through a unit area at that point.
SI unit: the joule per second square metre $\left( j / s \cdot m ^2\right)$ or watt per square metre $\left( W / m ^2\right)$.

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