Sound energy density level

The sound energy density level gives the ratio of a sound incidence as a sound energy value in comparison to a reference level of 0 dB (DIN 45630). It is a logarithmic measure of the ratio of two sound energy densities.

The energy produced by vibrations is known as sound

L(E)=10\,\log _{10}\left({\frac {E_{1}}{E_{0}}}\right){\rm {dB}}

where E₁ and E₀ are the energy densities. The unit of the sound energy density level is the decibel (dB).

If E₀ is the standard reference sound energy density of^[1]

E_{0}=10^{-12}\mathrm {\frac {J}{m^{3}}}

References

↑ DIN 1320: Acoustics, Version 1997-06, Beuth publishing

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