LW db?

en jag känner råkade ut för ett diagram med en skala märkt LW db känner igen det men kan inte placera vad det står för någon som vet?

diagrammet finns här

formatting link
under teknik / rpm db

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Hannu Kandelberg
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Lw = Sound Power Level -- The acoustic power radiated from a given sound source as related to a reference power level (typically 10^-12 watts) and expressed in decibels (dB) as:

Lw = 10log(W/10^-12) dB


Lw = 10log W + 120 dB


W = Acoustic power in watts

By definition, one Watt therefore corresponds to 120 dB for Lw.

/ mw

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