Sound energy

Sound measurements
Sound pressure p, SPL
Particle velocity v, SVL
Particle displacement ξ
Sound intensity I, SIL
Sound power Pac
Sound power level SWL
Sound energy
Sound energy density E
Sound energy flux q
Acoustic impedance Z
Speed of sound c
Audio frequency AF

Sound energy is the form of energy associated with the vibration or disturbance of matter. Sound waves require some kinds of materials to travel through.

Sound energy is defined as

$W = W_\mathrm{pot} + W_\mathrm{kin} = \int_V \frac{p^2}{2 \rho_0 c^2} dV + \int_V \frac{\rho v^2}{2} dV$

With

• p - sound pressure
• v - Particle velocity
• ρ₀ - density
• c - sound speed