Description: determined integral of the sound power, p, over a stated time interval of duration t (starting at t1 and ending at t2); Name: energy of sound
Description: integral of the sound power, p, over a stated time interval of duration t (starting at t1 and ending at t2); Name: sound energy
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