| Sound Power Level |
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Sound power level or '''acoustic power level''' is a Logarithmic Measure of the Sound Power in comparison to a specified reference level. The measure of a ratio of two Sound Power s is : where ''W''1 and ''W''0 are the powers. The sound power level is given the symbol ''L''w or SWL and is measured in " DBW ", which stands for Decibel with the suffix for Watt s. Decibels are Dimensionless . ''SPL'' stands for Sound Pressure Level , and is not the same thing. If W0 is the standard reference sound power, where : (W = watt), then instead of "dB", dB SWL is used. (SWL = sound power level). |
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