What mean sound of energy?

Sound energy or the energy of a sound wave generated in the spread of the wave in all directions from its source a fraction of the mass m a speed v = A ∙ ω , analog according to the formula v = r ∙ ω , where r = A - amplitude of the wave, and the energy (in julima = J):

The sound propagates in the form of spatial longitudinal waves in the air .

This is true for every particle of matter in which a wave propagates. The volume or volume of 1 m 3 of matter of mass ρ therefore has energy (in J / m 2 ):

where: m = ρ ∙ V = ρ ∙ 1 = ρ . If the wave propagates at speed v , then the amount of sound energy Φ (in W) 

will pass through the surface S perpendicular to the direction of wave propagation in 1 second 

and energy will pass through an area of 1 m 2 in 1 second (in W / m 2 ):

This quantity is called the sound energy density . 

lol for the pointsss