Description: Difference in total energy height between the outlet side and the inlet side of the installation.; Name: Total height energy difference of the plant
Description: Determined difference between the total head at the oulet side of the installation and the total head at the inlet side of the installation; Name: Installation total head
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