What Is the Formula That Links Sound Wave Power and Frequency?

[Werg22]

Was the formula tha links power and frequency (a formula that doesn't include intensity)?

 

[KingNothing]

Wouldn't it just be the amplitude of the wave?

 

[FredGarvin]

Power from a spherical source, is defined, in the far field as:

\Pi = \frac{4 \pi r^2 p^2_{rms}}{\rho_o c}

 

[ljde]

Power from a spherical source, is defined, in the far field as:

\Pi = \frac{4 \pi r^2 p^2_{rms}}{\rho_o c}

How do you derive this equation? Thanks