Editing Sound energy density (section)

==Sound energy density level<!--'Sound energy density level' redirects here-->==
The '''sound energy density level'''<!--boldface per WP:R#PLA--> gives the ratio of a sound incidence as a sound energy value in comparison to the reference level of 1 pPa (= 10<sup>−12</sup> pascals).<ref>[[Deutsches Institut für Normung]], ''Grundlagen der Schallmessung; Physikalische & subjektive Größen von Schall, Physical & subjective magnitudes of sound'', Norm, Standard, № [https://dx.doi.org/10.31030/1234608 DIN 45630‑1:1971‑12] (Berlin: Beuth, 1971‑12).</ref> It is a logarithmic measure of the ratio of two sound energy densities. The unit of the sound energy density level is the [[decibel]] (dB), a non-SI unit accepted for use with the SI Units.<ref name=SIUnits />{{rp|at=| Chapter 4: Non-SI units that are accepted for use with the SI, Table 8}}

The sound energy density level, ''L''(''E''), for a given sound energy density, ''E''<sub>1</sub>, in pascals, is 
:<math>
L(E) = 10\, \log_{10}\left(\frac{E_1}{E_0}\right) ~ \text{dB}
</math>,

where ''E''<sub>0</sub> is the standard reference sound energy density<ref name="DIN1320">[[Deutsches Institut für Normung]], ''Akustik—Begriffe, Acoustics—Terminology'', Norm, Standard, № [https://dx.doi.org/10.31030/1544140 DIN 1320:2009-12] (Berlin: Beuth, 2009‑12).</ref>

:<math>
E_0 = 10^{-12}\ \mathrm{Pa} 
</math> .