Sound energy density level

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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.

[edit] Definition

The sound energy density level LE is:

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}}

[edit] References

  1. ^ DIN 1320: Acoustics, Version 1997-06, Beuth publishing
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