Soundproofing glossary definition of sound power level. Logarithm of the ratio of a given sound power in a stated frequency band or with a stated frequency weighting, to the reference power of one picowatt (1 pW). Unit, bel (B); symbol, LW.

sound power level. Logarithm of the ratio of a given sound power in a stated frequency band or with a stated frequency weighting, to the reference power of one picowatt (1 pW). Unit, bel (B); symbol, LW. :

sound power level. Logarithm of the ratio of a given sound power in a stated frequency band or with a stated frequency weighting, to the reference power of one picowatt (1 pW). Unit, bel (B); symbol, LW.