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 dbLW db?
Jan 14, 2004
1 Replies
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
or
Lw = 10log W + 120 dB
where:
W = Acoustic power in watts
By definition, one Watt therefore corresponds to 120 dB for Lw.
/ mw
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