Sound energy

Sound measurements
Characteristic	Symbols
Sound pressure	p, SPL, LPA
Particle velocity	v, SVL
Particle displacement	δ
Sound intensity	I, SIL
Sound power	P, SWL, LWA
Sound energy	W
Sound energy density	w
Sound exposure	E, SEL
Acoustic impedance	Z
Audio frequency	AF
Transmission loss	TL

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

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
• $\rho _{0}$ - density
• $c$ - sound speed