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:

    “Al: Ain’t you gonna look back, Ma? Give the old place a last look?
    Ma Joad: We’re goin’ to California, ain’t we? Alright then, let’s go to California.
    Al: That don’t sound like you, Ma. You never was like that before.
    Ma Joad: I never had my house pushed over before. Never had my family stuck out on the road. I never had to lose everything I had in life.”
    —Nunnally Johnson (1897–1977)

    “I say, stamping the words with emphasis,
    Drink from here energy and only energy,”
    —Stephen Spender (1909–1995)