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:

    “There was never a sound beside the wood but one,
    And that was my long scythe whispering to the ground.”
    —Robert Frost (1874–1963)

    “After the planet becomes theirs, many millions of years will have to pass before a beetle particularly loved by God, at the end of its calculations will find written on a sheet of paper in letters of fire that energy is equal to the mass multiplied by the square of the velocity of light. The new kings of the world will live tranquilly for a long time, confining themselves to devouring each other and being parasites among each other on a cottage industry scale.”
    —Primo Levi (1919–1987)