Intensity of sound wave is rate of energy transfer over area

Sound-wave intensity at a surface is the average power conveyed by the wave, per unit area, through or onto that surface.

Conditions:

1. The surface is perpendicular to the direction of energy flow.

Links:

1. Wikipedia – Mathematical description

intensity

intensity of the sound wave.

Symbol:

I

Latex:

\(I\)

Dimension:

power/area

power

power, or rate of energy transfer, of the wave.

Symbol:

P

Latex:

\(P\)

Dimension:

power

area

Surface area.

Symbol:

A

Latex:

\(A\)

Dimension:

area

definition

I = P / A

Latex:

\[I = \frac{P}{A}\]