Sound energy density level
Encyclopedia
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.

Definition

The sound energy density level LE is:

where E1 and E0 are the energy densities. The unit of the sound energy density level is the decibel
Decibel
The decibel is a logarithmic unit that indicates the ratio of a physical quantity relative to a specified or implied reference level. A ratio in decibels is ten times the logarithm to base 10 of the ratio of two power quantities...

 (dB).

If E0 is the standard reference sound energy density
Sound energy density
The sound energy density or sound density is an adequate measure to describe the sound field at a given point as a sound energy value...

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