Description: Sound Energy Level is the logarithmic ratio of the sound energy to the reference sound energy.; Name: acoustic energy level
Description: Determined ten times the logarithm to the base 10 of the ratio of the sound energy, j, to a reference value, j0, expressed in decibels; Name: Sound energy level
Description: difference between the total head at the outlet side of the installation and the total head at the inlet side of the installation; Name: installation total head