Sound Energy

Sound Energy

Form of energy associated with the vibration or disturbance of matter. Sound is a mechanical wave and as such requires a medium to travel through.

The sound energy in a volume of interest is defined as the sum of the potential and kinetic energy densities integrated over that volume:

W = W_\mathrm{potential} + W_\mathrm{kinetic} = \int_V \frac{p^2}{2 \rho_0 c^2} dV + \int_V \frac{\rho v^2}{2} dV

With

  • – the volume, or region of 3-space, of interest
  • – sound pressure
  • – particle velocity
  • – density of the medium without sound present
  • – local density of the medium
  • – sound speed

Read more about Sound Energy:  See Also

Famous quotes containing the words sound and/or energy:

    “The last sound on the worthless earth will be two human beings trying to launch a homemade spaceship and already quarreling about where they are going next.”
    —William Faulkner (1897–1962)

    “Long before Einstein told us that matter is energy, Machiavelli and Hobbes and other modern political philosophers defined man as a lump of matter whose most politically relevant attribute is a form of energy called “self-interestedness.” This was not a portrait of man “warts and all.” It was all wart.”
    —George F. Will (b. 1941)