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 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 (dB).
- DIN 1320: Acoustics, Version 1997-06, Beuth publishing