Description: 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: 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: Probability that an item is in a state to perform as required at a given instant, under given conditions, assuming that the necessary external resources are provided ; Name: Instantaneous availability