Sound Power - Sound Power With Plane Sound Waves

Sound Power With Plane Sound Waves

Between sound power and other important acoustic values there is the following relationship:

P_\mathrm{ac} = \xi^2 \cdot \omega^2 \cdot Z \cdot A = v^2 \cdot Z \cdot A = \frac{a^2 \cdot Z \cdot A}{\omega^2} = \frac{p^2 \cdot A}{Z} = E \cdot c \cdot A = I \cdot A\,

where:

Symbol Units Meaning
p Pa sound pressure
f Hz frequency
ξ m particle displacement
c m/s speed of sound
v m/s particle velocity
ω = 2πf rad/s angular frequency
ρ kg/m3 density of air
Z = c · ρ N·s/m³ acoustic impedance
a m/s² particle acceleration
I W/m² sound intensity
E W·s/m³ sound energy density
Pac W sound power or acoustic power
A m² area

Read more about this topic:  Sound Power

Famous quotes containing the words sound, power, plane and/or waves:

    “Envy awakens at the sound of a distant laugh.”
    —Mason Cooley (b. 1927)

    “and men strive with each other not for power or the accumulation of paper
    but in joy create for others the house, the poem, the game of
    athletic beauty.

    Then washed in the brightness of the vision,
    I saw how in its radiance would grow and be nourished and suddenly
    burst into terrible and splendid bloom
    the blood-red flower of revolution.”
    —Dudley Randall (b. 1914)

    “We’ve got to figure these things a little bit different than most people. Y’know, there’s something about going out in a plane that beats any other way.... A guy that washes out at the controls of his own ship, well, he goes down doing the thing that he loved the best. It seems to me that that’s a very special way to die.”
    —Dalton Trumbo (1905–1976)

    “There are no waves without wind.”
    —Chinese proverb.