Description: Ten times the common logarithm of the ratio of sound energy to the reference sound energy of 1 pW·s expressed in decibels.; 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: norm describing the material. The material number is taken from this norm. Type and number of the norm with issue year and issue month must be given; Name: Reference norm material of the valve ball/valve cone