Description: ten times the logarithm to the base 10 of the ratio of the sound power radiated by a sound source to the reference sound power (P0 = 10?12 W); Name: acoustic power level
Description: ten times the logarithm to the base 10 of the ratio of the sound power of a source, p, to a reference value, p0, expressed in decibels; Name: sound output level
Description: determination of the time for the next exchange of the pump relative to exchangetime, if operator specific pump exchange mode is activated; Name: exchange time difference