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

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