Answer:
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):
[tex]E = \frac{m \times {v}^{2} }{2} = \frac{m \times {A}^{2} \times {w}^{2} }{2} [/tex]
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 ):
[tex]e = \frac{p \times {A}^{2} \times {w}^{2} }{2} [/tex]
where: m = ρ ∙ V = ρ ∙ 1 = ρ . If the wave propagates at speed v , then the amount of sound energy Φ (in W)
[tex]ф = e \times S
\times v
[/tex]
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 ):
[tex]j = e \times v = \frac{p \times {A}^{2} \times {w}^{2} \times v}{2} [/tex]
This quantity is called the sound energy density .
